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'.
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Question: Question: *** safely conduct *** experiment *** chemicals*** *** *** *** always ***?  (A) Work in large groups. (B) Wear safety goggles. (C) Wear short sleeves. (D) Keep a window open.

Answer: B.


Question: Question: The continuous *** of a *** to an adult *** that produces seeds is known as a  (A) lunar cycle. (B) weekly cycle. (C) daily cycle. (D) life cycle.

Answer: D.


Question: Question: A group of fifth grade students go to the school park on a sunny day and *** the *** of their *** at 10:00 AM, at noon, and at 2:45 PM. To *** and record the data from their observations, they use a ___.  (A) thermometer and balance (B) clock and measuring tape (C) clock and calculator (D) clock and thermomete.

Answer:
D.