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).

Example Input: Question: What part of the plant is the most important for the process of photosynthesis?  (A) Stigma (B) Stamen (C) Leaves (D) Ste?
Example Output: C.

Example Input: Question: Which adaptive feature most helps a baby jaguar survive the first few weeks of life?  (A) the ability to roar (B) the ability to hunt (C) a diet of land mammals (D) being born during spring month?
Example Output: D.

Example Input: Question: A giraffe's long neck helps it eat leaves that are high on trees. This trait can be considered a(an)  (A) adaptation. (B) difficulty. (C) camouflage. (D) migration?
Example Output:
A.