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:
Teak can be found in (A) glacier sheets (B) blue songs (C) groves (D) underwater trenches

Ex Output:
C


Ex Input:
When there is an increase in atmospheric temperature, then (A) glaciers become too large (B) global sea level decreases (C) Antartica and Greenland icebergs will melt (D) Earth absorbs less sunlight

Ex Output:
C


Ex Input:
The circulatory system brings oxygen to the body from where? (A) The chest (B) The brain (C) The feet (D) The stomach

Ex Output:

A