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 star produces light energy and heat because it has a variety of (A) moon rotation causing friction (B) light energy flowing to earth (C) reactions of nuclear form (D) global warming caused by co2
Example Output: C

Example Input: With extended feet, this creature may grab bass from overhead. (A) bees (B) shark (C) sparrow (D) eagle
Example Output: D

Example Input: An example of an electrical circuit running properly would be (A) dimming lights (B) swimming in pools (C) running outside (D) riding bikes
Example Output:
A