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: The tailgate of a pickup truck was rusting where the paint was scratched off. What chemical change had occurred?  (A) Liquidation (B) Conservation (C) Oxidation (D) Reductio.

A: C.
****
Q: Question: During which *** of the year would a ***'s *** be ***?  (A) summer (B) spring (C) winter (D) fal.

A: E.
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Q: Question: Which two *** would BEST help a person *** *** length?  (A) Taste and smell (B) Touch and sight (C) Sight and hearing (D) Smell and hearin.

A:
B.
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