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).

Input: Consider Input: Question: A decomposer is an organism that  (A) hunts and eats animals (B) migrates for the winter (C) breaks down dead plants and animals (D) uses water and sunlight to make foo?

Output: C.


Input: Consider Input: Question: Which of the following is an example of a chemical change?  (A) clouds forming (B) sugar dissolving (C) water freezing (D) a candle burnin?

Output: D.


Input: Consider Input: Question: A see-saw is an example of which type of simple machine?  (A) lever (B) pulley (C) wheel (D) inclined plan?


Output: A.