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: the Himalayas were formed by rock folding, Fact2: Movements in the earth's crust have folded and cracked the older rocks., Question: the Himalayas were formed from older what (A) soils (B) plates (C) rivers (D) rock (E) eras (F) meadows (G) dirt (H) plains

Ex Output:
D

Ex Input:
Fact1: Populations of viruses do not grow through cell division because they are not cells., Fact2: Prokaryotes multiply by simple cell division, forming clones or exact copies of themselves., Question: What are viruses not? (A) self-copies (B) an object (C) HIV (D) humans (E) infectious (F) homogenous (G) dangerous (H) prokaryotes

Ex Output:
H

Ex Input:
Fact1: acid rain has a negative impact on water quality, Fact2: Water pollution Water is life., Question: Acid rain has a negative impact on what? (A) Life (B) humans (C) Impact craters (D) Negative Charge (E) Battery acid (F) biome (G) rivers (H) plants

Ex Output:
A