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: A student wants to look under a heavy rock. Which simple machine would be BEST to use to lift the rock?  (A) Wheel and axle (B) Lever (C) Inclined plane (D) Scre.

Output: B.


Input: Consider Input: Question: Drew knows that *** is *** on its ***. He also knows this *** is *** for the *** that a *** on *** will ***. When the *** *** is *** *** the ***, what *** will it be in ***?  (A) fall (B) spring (C) summer (D) winte.

Output: E.


Input: Consider Input: Question: A *** puts *** *** *** *** the same *** and *** of soil. She gives them the same *** of water. She puts one of these *** *** *** *** *** and the other *** *** dark ***. This *** *** how the *** respond to  (A) light (B) air (C) water (D) soil.


Output: E.