In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").

Ex Input:
Fact1: Evolution is a change in the characteristics of living things over time., Fact2: Trees are the largest of living things., Question: Evolution changes the characteristics of what over time? (A) the Moon (B) Man (C) life (D) trees (E) rocks (F) the Sun (G) humans (H) plants

Ex Output:
D


Ex Input:
Fact1: Male dogs use pheromones in urine to mark their territory., Fact2: Pheromones are natural aphrodisiacs., Question: What do male dogs use in urine to mark their territory? (A) Natural aphrodisiacs (B) competing for resources (C) Tails (D) Urine  cleaner (E) Something coming from a gland (F) Chemical energy (G) an area swollen with pus (H) Chew toys

Ex Output:
A


Ex Input:
Fact1: Endospores are commonly found in soil and water., Fact2: Some bacteria form resistant cells called endospores., Question: where are bacteria that form resistant cells usually seen? (A) aqueous solution (B) brain cells (C) Localized damage (D) air and clouds (E) soil and water (F) microscopes (G) vegetation (H) mold

Ex Output:

E