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'.

Input: Consider Input: Question: A group of fifth grade students go to the school park on a sunny day and measure the length of their shadows at 10:00 AM, at noon, and at 2:45 PM. To measure 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.

Output: B.


Input: Consider Input: Question: Which is a *** of a *** that is most *** a *** of its ***?  (A) its color (B) its length of ears (C) its food preference (D) its ability to see in the dar.

Output: E.


Input: Consider Input: Question: *** of *** *** occurs ___.  (A) when the particles of the substance are able to slide past one another (B) at 0Â°C (C) when a liquid changes to a solid, regardless of temperature (D) when energy is added to a substanc.


Output: E.