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: When the *** *** is *** *** through *** a ***, what is most likely to ***?  (A) the cooking time (B) the cake's size (C) the amount of calories (D) the temperature in the ove.
Example Output: E.

Example Input: Question: How do plants most commonly break large rocks into smaller pieces?  (A) Plant leaves insulate surrounding rocks from extreme temperatures. (B) Plant roots grow into cracks in rocks. (C) Seeds from plants fall onto rocks and release acidic compounds. (D) Stems of plants surround and squeeze rocks.
Example Output: B.

Example Input: Question: *** is a *** *** that benefits the *** *** of the *** ***. How could these *** *** *** ***?  (A) The winds could blow oil spills into the bay. (B) The winds could be converted to fossil fuel. (C) The winds could blow air pollution toward land. (D) The winds could be converted to electrical energy.
Example Output:
E.