TASK DEFINITION: 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'.
PROBLEM: Question: A flower produces *** that fall to the ground and *** into new plants that produce more flowers. The *** begin to *** by the process of  (A) fertilization. (B) germination. (C) maturation. (D) pollination.

SOLUTION: E.

PROBLEM: Question: Which method below would be the best way to *** if an ***, plastic foam, a piece of ***, or a candle would *** on water?  (A) observing each object in water (B) measuring the size of each object (C) calculating the weight of the objects (D) comparing the shapes of the object.

SOLUTION: E.

PROBLEM: 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.

SOLUTION:
E.