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: Rocket engines can lift rockets because (A) of how much fuel they use (B) of how fast they are (C) of the power the hit the ground with (D) of how tall they are
Example Output: C

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

Example Input: the Earth rotating on its axis causes stars to appear to move across the sky when? (A) sleeping hours (B) sun time (C) day (D) daytime
Example Output:
A