You are given a paragraph, a question and some answer options (associated with "A", "B", "C", "D", etc.) You need to list all the correct answer options with their associated letters (e.g. "A" can be a valid answer). Note that sometimes, more than one option can answer the question correctly and completely. In those cases, please generate all such options separated by a comma (e.g. "A, B" is a valid answer). Do not generate anything else apart from one or more of the following characters: 'A', 'B, 'C', 'D', etc.

Ex Input:
Paragraph- Sent 1: In the popular mind, the history of Hong Kong, long the entryway to China for Westerners, begins in 1841 with the British occupation of the territory.
Sent 2: However, it would be wrong to dismiss the long history of the region itself.
Sent 3: Archaeologists today are working to uncover Hong Kong's past, which stretches back thousands of years.
Sent 4: You can get a glimpse into that past at Lei Cheng Uk Museum's 1,600-year-old burial vault on the mainland just north of Kowloon.
Sent 5: In 1992, when construction of the airport on Chek Lap Kok was begun, a 2,000-year-old village, Pak Mong, was discovered, complete with artifacts that indicated a sophisticated rural society.
Sent 6: An even older Stone Age site was discovered on Lamma Island in 1996.
Sent 7: While Hong Kong remained a relative backwater in early days, nearby Guangzhou (Canton) was developing into a great trading city with connections in India and the Middle East.
Sent 8: By a.d.
Sent 9: 900, the Hong Kong islands had become a lair for pirates preying on the shipping in the Pearl River Delta and causing a major headache for burgeoning Guangzhou; small bands of pirates were still operating into the early years of the 20th century.
Sent 10: In the meantime, the mainland area was being settled by incomers, the "Five Great Clans": Tang, Hau, Pang, Liu, and Man.
Sent 11: First to arrive was the Tang clan, which established a number of walled villages in the New Territories that still exist today.
Sent 12: You can visit Kat Hing Wai and Lo Wai, villages with their walls still intact.
Sent 13: Adjacent to Lo Wai is the Tang Chung Ling Ancestral Hall, built in the 16th century, which is still the center of clan activities.
Sent 14: The first Europeans to arrive in the Pearl River Delta were the Portuguese, who settled in Macau in 1557 and for several centuries had a monopoly on trade between Asia, Europe, and South America.
Sent 15: As Macau developed into the greatest port in the East, it also became a base for Jesuit missionaries; it was later a haven for persecuted Japanese Christians.
Sent 16: While Christianity was not a great success in China, it made local headway, evidenced today by the numerous Catholic churches in Macau's historic center.
Sent 17: Intermarriage with the local Chinese created a community of Macanese, whose culture can still be seen in Macau's architecture and cuisine. 
Question: Who were the first Europeans to control the greatest port in the East? (A) The Portuguese (B) South Africans (C) Asians (D) The British.

Ex Output:
A.


Ex Input:
Paragraph- Sent 1: Honours and legacy In 1929, Soviet writer Leonid Grossman published a novel The d'Archiac Papers, telling the story of Pushkin's death from the perspective of a French diplomat, being a participant and a witness of the fatal duel.
Sent 2: The book describes him as a liberal and a victim of the Tsarist regime.
Sent 3: In Poland the book was published under the title Death of the Poet.
Sent 4: In 1937, the town of Tsarskoye Selo was renamed Pushkin in his honour.
Sent 5: There are several museums in Russia dedicated to Pushkin, including two in Moscow, one in Saint Petersburg, and a large complex in Mikhaylovskoye.
Sent 6: Pushkin's death was portrayed in the 2006 biographical film Pushkin: The Last Duel.
Sent 7: The film was directed by Natalya Bondarchuk.
Sent 8: Pushkin was portrayed onscreen by Sergei Bezrukov.
Sent 9: The Pushkin Trust was established in 1987 by the Duchess of Abercorn to commemorate the creative legacy and spirit of her ancestor and to release the creativity and imagination of the children of Ireland by providing them with opportunities to communicate their thoughts, feelings and experiences.
Sent 10: A minor planet, 2208 Pushkin, discovered in 1977 by Soviet astronomer Nikolai Stepanovich Chernykh, is named after him.
Sent 11: A crater on Mercury is also named in his honour.
Sent 12: MS Alexandr Pushkin, second ship of the Russian Ivan Franko class (also referred to as "poet" or "writer" class).
Sent 13: Station of Tashkent metro was named in his honour.
Sent 14: The Pushkin Hills and Pushkin Lake were named in his honour in Ben Nevis Township, Cochrane District, in Ontario, Canada.
Sent 15: UN Russian Language Day, established by the United Nations in 2010 and celebrated each year on 6 June, was scheduled to coincide with Pushkin's birthday. 
Question: Sergei Bezrukov portrayed Pushkin onscreen in what film? (A) The last poet (B) Pushkin: The Last Duel.

Ex Output:
B.


Ex Input:
Paragraph- Sent 1: Sometimes traits can vary from parent to offspring.
Sent 2: These changes are due to mutations.
Sent 3: Mutations are a random change.
Sent 4: Mutations are natural.
Sent 5: Some mutations are harmful.
Sent 6: In this case, the organism may not live to reproduce.
Sent 7: The trait will not be passed onto offspring.
Sent 8: Others variations in traits have no effect on survival.
Sent 9: Can some mutations be good for a living thing?
Sent 10: Other mutations can have great benefits.
Sent 11: Imagine being the first moth that can blend into its background.
Sent 12: It would have a better chance of survival.
Sent 13: A living thing that survives is likely to have offspring.
Sent 14: If it does, it may pass the new trait on to its offspring.
Sent 15: Thats good news for the offspring.
Sent 16: The offspring may be more likely to survive.
Sent 17: Mutations are one way living things adapt to new conditions. 
Question: Do mutations always affect survival? (A) No (B) Yes (C) Sometimes they have no effect.

Ex Output:

A, C.


