In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").

Example Input: A needle lined with magnets will pull north. If north is to the right and you want to go west, you'd walk (A) straight (B) left (C) backwards (D) right
Example Output: A

Example Input: Someone is driving at night. The day was warm, but now the night is cool, and there is a lot of mist that is difficult to see through. The mist is prevalent because (A) humidity from the day condensed as night progressed (B) warm air is usually found in daytime (C) it is always misty at night (D) the cool air makes everything feel warm
Example Output: A

Example Input: The cracks in a sidewalk could be caused by (A) black holes (B) Pine (C) time travel (D) emotions
Example Output:
B