Detailed Instructions: 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.
Problem:Paragraph- Sent 1: Joe's parents are farmers and they have a huge farm with cows, chickens, and ducks.
Sent 2: Joe loves the farm and all the things he gets to play around and play on.
Sent 3: One day, Joe's father told him not to get near a tractor that was sitting in the field.
Sent 4: His father was worried that Joe would climb on it and hurt himself.
Sent 5: Joe went out to the field and was feeding the horses and cows.
Sent 6: When he was done, he saw the tractor his father told him not to get near.
Sent 7: He knew that climbing on the tractor wouldn't hurt anything, so he did.
Sent 8: He climbed on to the seat and sat there.
Sent 9: Then, he pretended he was his father and pretended that he was driving the tractor.
Sent 10: Joe's father saw him playing on the tractor and called for him.
Sent 11: Joe heard his father calling for him and got off the tractor really fast.
Sent 12: When he did that, he fell off and hurt his arm.
Sent 13: Joe was in pain and his father came running to check on him and picked him up and sat him on a bench and asked him why he did that.
Sent 14: Joe looked at his father and said, "I wanted to be like you."Sent 15: Joe's father gave him a hug and asked him if he wanted to ride with him on the tractor.
Sent 16: Joe did and after he got a bandage on his arm, he and his father rode in the field on the tractor. 
Question: What kinds of animals did Joe's father have on his farm? (A) He had horses, cows, chickens, and ducks (B) Cats and dogs (C) Tens of different types of animals (D) Pigs, donkeys and sheep (E) Cows, horses, chickens and ducks.
Solution:
A, E.