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:
Chlorophyll is good for allowing plants to absorb energy and (A) is dry (B) is dead (C) is clear (D) is healthy

Ex Output:
D


Ex Input:
Gas can fill any container it is given, and liquid (A) is standard weight and size (B) is the opposite of variable (C) only needs a few (D) uses what it needs

Ex Output:
D


Ex Input:
What covers over 90% of the Earth's surface and 0% of the moon's surface (A) a magnesium iron silicate mineral (B) chemical element with the symbol S (C) the element with the symbol Fe (D) that which contains 2 hydrogen and 1 oxygen molecules

Ex Output:

D