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'.

Input: Consider Input: Question: *** safely conduct *** experiment *** chemicals*** *** *** *** always ***?  (A) Work in large groups. (B) Wear safety goggles. (C) Wear short sleeves. (D) Keep a window open.

Output: B.


Input: Consider Input: Question: What will most likely happen to an igneous rock that has been eroded and deposited at the bottom of a lake?  (A) It will never change. (B) It will change into a sedimentary rock. (C) It will change into a bigger igneous rock. (D) It will change into a metamorphic rock.

Output: B.


Input: Consider Input: Question: In which *** would a *** *** be *** *** from ***?  (A) a shady forest (B) a snowy field (C) a grassy lawn (D) a muddy riverban.


Output: E.