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: *** purchased a *** for making a *** ramp. Which of the following is most *** to have for *** the *** ***?  (A) a picture showing the colors of different ramp parts (B) a diagram showing some ways to use the ramp (C) a list of prices for other available kits (D) a set of instructions for the kit material.

A: E.
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Q: Question: A student perfoms an experiment by feeding two mice different amounts of food for a week. At the end of the week, she weighs the two mice. *** the mice is an example of  (A) a measurement (B) a hypothesis (C) an explanation (D) background researc.

A: A.
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Q: Question: Which device is used to determine the volume of a liquid?  (A) anemometer (B) graduated cylinder (C) test tube (D) thermomete.

A:
B.
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