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: A *** *** her *** by *** a *** on a ***. Her *** *** *** the *** ***  (A) heat energy can be transferred from one object to another (B) mechanical energy can be transferred from one object to another (C) sound energy can be reflected from one object to another (D) light energy can be reflected from one object to anothe.
Example Output: E.

Example Input: Question: *** *** *** *** *** *** prevent infections *** *** *** *** cuts *** scrapes?  (A) apply a cold ice pack (B) raise the injured area (C) apply pressure to stop bleeding (D) wash the area with warm, soapy wate.
Example Output: D.

Example Input: Question: A student puts two identical *** in the same type and amount of soil. She gives them the same amount of water. She puts one of these *** near a sunny window and the other in a *** room. This experiment tests how the *** *** to  (A) light (B) air (C) water (D) soi.
Example Output:
A.