In this subtask, you will answer a simple science question. Please indicate the correct answer. If you're not sure about the answer, choose the last option "I don't know". Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D', 'E'. The "A"-"D" responses correspond to the answer options mentioned in the input. There is a 5th option "E" which should be used for questions for which you're not sure about the answer (e.g., when the questions do not provide enough information to answer).

Ex Input:
Question: Which is a characteristic of a dog that is most likely a result of its environment?  (A) its color (B) its length of ears (C) its food preference (D) its ability to see in the dar?

Ex Output:
C.


Ex Input:
Question: Owen tested a physical property of a mineral. He rubbed a mineral sample on a piece of white tile. The mineral left a red mark on the tile. Which of the following physical properties of the mineral was Owen most likely testing?  (A) cleavage (B) hardness (C) luster (D) strea?

Ex Output:
B.


Ex Input:
Question: The weather is part of the daily news. Tracking the weather is most important for people who  (A) work inside banks. (B) sell televisions. (C) plant crops. (D) use computers?

Ex Output:

C.