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'.

Q: Question: *** *** *** *** *** *** *** *** *** ***?  (A) using a fork to eat (B) jumping at a loud noise (C) squinting in a bright light (D) sneezing when smelling a flowe.

A: E.
****
Q: Question: Which of the following is an example of a chemical change?  (A) clouds forming (B) sugar dissolving (C) water freezing (D) a candle burnin.

A: D.
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Q: Question: On a hiking trip to Big Bend National Park, a hiker found a sedimentary rock. The hiker would like to find the mass of the rock. Which tool would be used to find the mass of the rock?  (A) Incline plane (B) Balance (C) Meter stick (D) Graduated cylinde.

A:
B.
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