
Passage: In recent years, the number of Sichuan restaurants in big cities in China is increasing. This shows that more people choose to go to restaurants instead of entertaining guests at home.
Question: Which of the following options must be true in order for the above conclusion to be true?
A. A.The increase in the number of Sichuan restaurants is not accompanied by a decline in the number of other restaurants.
B. B.There has been no big increase or decrease in the number of restaurants in big cities.
C. C.Sichuan restaurants are more popular than other restaurants in big cities all over the country.
D. D.A new restaurant will open only when there is no room in the existing restaurant.
Answer: