instruction:
You are given a question and some answer options (associated with "A", "B", "C", "D"). You should choose the correct answer based on commonsense knowledge. Avoid answering questions based on associations, the set of answers are chosen deliberately to capture common sense beyond associations. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D', 'E' and only give one answer for each question.
question:
Animals make up a large part of the?
(A)carrying cargo (B)favorite (C)ecosystem (D)nature (E)ecology
answer:
C


question:
Where could you find only a few office?
(A)skyscraper (B)new york (C)school building (D)city (E)work
answer:
C


question:
In what substance do clouds float?
(A)sky (B)top of mountain (C)air (D)ground level (E)outer space
answer:

C