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 student wants to find out how many different kinds of birds are found in a park. In addition to a bird *** ***, the student should use  (A) binoculars (B) goggles (C) a microscope (D) a hand len.

Output: A.


Input: Consider Input: Question: *** *** *** has *** *** *** more *** *** *** of ***. *** ***oline *** from oil, this *** *** *** the *** *** of *** by  (A) increasing the need to search for more oil. (B) reducing the time it takes for oil to be renewed. (C) decreasing the amount of oil that exists underground. (D) extending the time that oil will be available for people to use.

Output: E.


Input: Consider Input: Question: Television provides some ***. What is one way that *** has *** ***?  (A) Television manufacturing uses many toxic chemicals. (B) The ads on television show many popular toys that kids want. (C) Television provides information about current weather conditions. (D) The electricity used to run televisions is one use of natural resources.


Output: C.