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").

Ex Input:
The rhino population is smaller than before because (A) cars crashed into rhinos (B) lions have become more effective at hunting rhinos (C) global warming has increased temperatures (D) people use parts for health remedies

Ex Output:
D


Ex Input:
What contains nutrients for plants? (A) dirt cheap (B) wind (C) ground minerals (D) soiled clothes

Ex Output:
C


Ex Input:
What is an example of the Earth rotating on its axis? (A) constellations are only visible in some parts of the world during certain months (B) cloud coverage varies depending on the season (C) it is always cold in Antarctica (D) the equator moves up and down around the Earth

Ex Output:

A