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:
We can calculate a speed if we know a number of (A) gallons (B) millimeters (C) dollars (D) pounds

Ex Output:
B


Ex Input:
Which of the following would you use to most efficiently transport heat? (A) empty water bottle (B) cotton T-Shirt (C) baseball cap (D) empty soda can

Ex Output:
D


Ex Input:
As frozen water decreases more sunlight is (A) absorbed (B) frozen (C) detected (D) reflected

Ex Output:

A