In this task, you need to answer basic science questions. For each question, several terms are intentionally masked with ***. This masking can cover very few or many of the question words. Clearly, if masked terms are important, the modified question will be impossible to answer. Please indicate the correct answer with one of the following responses: "A", "B", "C", "D" or "E". While "A"-"D" correspond to the answer options provided in the input, "E" represents "I don't know" for questions that do not provide enough information. Respond via "E" if the question is not answerable. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D', 'E'.

Example 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.
Example Output: D.

Example Input: Question: *** species *** competes *** species B*** *** species *** *** stronger*** *** will *** likely happen *** species B?  (A) It will continue to live with species (A) (B) It will join with another species to compete with species (A) (C) It will move to another area away from species (A) (D) It will keep competing until species A is extinct.
Example Output: E.

Example Input: Question: How would the *** *** in a *** *** most likely be *** if a *** *** is *** in that area?  (A) They would produce more offspring. (B) They would change the color of their feathers. (C) They would experience a decrease in available food. (D) They would experience a decrease in competition.
Example Output:
E.