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'.

[EX Q]: Question: A group of students was *** an *** to *** whether certain materials will *** or *** when placed on ***. *** the *** ***, one student said, I *** the *** will float.? This *** was  (A) a conclusion (B) a fact (C) an observation (D) a predictio.
[EX A]: E.

[EX Q]: Question: In the forest, one type of tree produces special seeds. These *** start to grow only after going through a fire. In the fire, the adult trees are destroyed. Which resources, needed for ***, are now available to the newly *** seeds?  (A) sunlight and wind (B) sunlight and space (C) soil and pollen producers (D) pollen producers and spac.
[EX A]: B.

[EX Q]: Question: *** ***s are *** that *** in a *** *** *** that is *** *** and *** by ***. This *** of *** *** *** *** and *** *** of ***. The *** ***'s *** in this *** is that it ***  (A) pry open shells. (B) produce a tiny light. (C) move quickly along the sea bottom. (D) survive the pressurized atmosphere of deep water.
[EX A]:
E.