instruction:
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'.
question:
Question: A student found a *** while *** in the ***. By *** at the rock, she could *** the  (A) exact weight of the rock. (B) length of time the rock had been on the hiking path. (C) color and shape of the rock. (D) exact length of the rock.
answer:
E.


question:
Question: Wind is a natural resource that benefits the southeastern shore of the Chesapeake Bay. How could these *** best *** ***?  (A) The winds could blow oil spills into the bay. (B) The winds could be converted to fossil fuel. (C) The winds could blow air pollution toward land. (D) The winds could be converted to electrical energy.
answer:
D.


question:
Question: *** *** the *** of *** on the *** of snapdragons. He *** the *** from the *** and *** that *** do *** *** *** in *** ***. What is the *** of this *** in the *** ***?  (A) It helps to organize the data. (B) It helps to evaluate the hypothesis. (C) It helps to prepare for an investigation. (D) It helps to collect information from observations.
answer:

E.