Task: 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'.
Categories: Misc.
Domains: Natural Science
Reasoning: Abductive Reasoning; Scientific Reasoning

Positive examples:
input: Question: *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***.  (A) dissolving (B) deposition (C) weathering (D) erosion.
output: E.
explanation: All the words are dropped, so the correct answer should be 'E' that stands for "I don't know".; input: Question: *** *** *** *** *** kinetic energy?  (A) a book sitting on a shelf (B) a ball rolling down a hill (C) a runner about to start a race (D) a window getting hot from the sun.
output: B.
explanation: Even though several words have been dropped here, the remaining word "kinetic energy" is enough to answer this question. Option A, C and D does involve any movement, so they can't be associated with "kinetic energy". Only option B involves movement of a ball, so this has to be the correct answer.; input: Question: *** *** producers *** *** *** food?  (A) summer, because there is more sunlight (B) summer, because there is more heat (C) spring, because there is more rain (D) spring, because there are more leaves.
output: E.
explanation: Even though several words are remained in the question, the information is not enough to answer the question because "sunlight" in "A", "heat" in "B", "rain" in "C" and "leaves" in "D" help in producing food. So, the expected answer would be "E" or "I don't know; the information is not enough".

Negative examples:
input: Question: *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***.  (A) dissolving (B) deposition (C) weathering (D) erosion.
output: I don't know; the information is not enough.
explanation: This is a bad answer because there are only 5 possible answers ('A', 'B', 'C', 'D' or 'E') that is allowed in this question. The correct answer should have been 'E' which is the correct way to indicate answers you're not sure about.; input: Question: *** *** *** *** *** kinetic energy?  (A) a book sitting on a shelf (B) a ball rolling down a hill (C) a runner about to start a race (D) a window getting hot from the sun.
output: ball rolling.
explanation: Even though 'ball rolling' is the only phenomena that deals with kinetic energy out of the four phenomenon mentioned in the question, the correct answer should be 'B'. Remember there are only 5 possible answers ('A', 'B', 'C', 'D' or 'E').; input: Question: *** *** producers *** *** *** food?  (A) summer, because there is more sunlight (B) summer, because there is more heat (C) spring, because there is more rain (D) spring, because there are more leaves.
output: E, A.
explanation: Only one of the following options ('A', 'B', 'C', 'D' or 'E') is allowed to be the answer. Multiple options can not be correct. The correct answer here would have been 'E'.