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").

Input: Consider Input: A glacier moved through an area years and years ago, and scientists can tell this by (A) looking at the moon (B) looking at the dogs (C) looking at the sky conditions (D) glancing at nearby stone

Output: D

Input: Consider Input: A person who wants to eat a watermelon may consider spitting out its (A) dark pips (B) good taste (C) coco pebbles (D) red fruit

Output: A

Input: Consider 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
Output: A