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: Which is a byproduct of a lightbulb? (A) taste (B) death (C) warmth (D) sound
Example Output: C

Example Input: An example of an acquired characteristic is (A) the thickness of a horse's mane (B) the length of a horse's mane (C) the number of legs a horse has (D) the color of a horse's mane
Example Output: B

Example Input: Which would you use a graduated cylinder for? (A) to measure bone shards (B) to measure a solid (C) to measure a dog (D) to measure grape kool-aid
Example Output:
D