In this subtask, you will answer a simple science question. Please indicate the correct answer. If you're not sure about the answer, choose the last option "I don't know". Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D', 'E'. The "A"-"D" responses correspond to the answer options mentioned in the input. There is a 5th option "E" which should be used for questions for which you're not sure about the answer (e.g., when the questions do not provide enough information to answer).
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Question: Question: Which is the best example of recycling?  (A) using low energy appliances (B) washing and reusing plastic cups (C) using empty milk cartons as flower planters (D) using aluminum cans to make new product?

Answer: D.


Question: Question: Air and water are necessary for ____ to survive.  (A) plants (B) animals (C) both plants and animals (D) nonliving thing?

Answer: C.


Question: Question: The Moon orbits the Earth ___.  (A) every 27.3 days (B) every 365.25 days (C) four times a year (D) every da?

Answer:
A.