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: Which of the following describes a liquid?  (A) It becomes vapor at the boiling point. (B) It has particles that are far apart. (C) It can be compressed. (D) It changes volume when placed in a different container.
[EX A]: A.

[EX Q]: Question: When liquid water freezes, it forms ice. What is the physical state of an ice cube?  (A) gas (B) solid (C) liquid (D) plasm.
[EX A]: B.

[EX Q]: Question: Tyrone put two *** in a plastic *** of water and shook it. After he stopped *** the bottle, he observed that small *** of the *** were floating in the water. What is the best prediction he can make based on this observation? If *** the *** *** *** of *** to *** off, ___.  (A) then using cold water will break off more pieces (B) then using hot water will make the stones change colors (C) then shaking for a longer amount of time will break off more pieces (D) then shaking for a shorter amount of time will make the rocks change color.
[EX A]:
E.

