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'.

[EX Q]: Question: Seth read a Celsius thermometer before he made plans to play with his friends for the day. The thermometer read *** ***. Which *** listed below could Seth and his friends do that would best suit the current *** outside?  (A) Go swimming (B) Play in the rain (C) Sell lemonade at their lemonade stand (D) Go to the movie theate.
[EX A]: E.

[EX Q]: Question: *** *** *** *** *** *** *** *** *** ***?  (A) Sunlight (B) Water (C) Starch (D) Chlorophyl.
[EX A]: E.

[EX Q]: Question: *** form *** energy *** needed *** change water *** *** liquid *** *** gas?  (A) heat (B) mechanical (C) chemical (D) sound.
[EX A]:
A.