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:
Which ingredient may cause chemical change? (A) almonds (B) milk (C) citrus juice (D) olive oil

Ex Output:
C

Ex Input:
The earth makes its way around the sun. Because of the constant rotation, the appearance of these is unlikely to be regular. (A) the moon (B) the oceans (C) celestial bodies (D) the sun

Ex Output:
C

Ex Input:
If you hold the compass sideways while at the south pole, where do the needles point? (A) to the side (B) both down (C) both up (D) up and down

Ex Output:
D