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: some animals' fur grows thicker for staying warm in the winter, Fact2: During winter, their hollow fur absorbs much heat as they sun themselves., Question: hollow fur keeps animals what (A) fats (B) camouflaged (C) safe (D) warm (E) cooled (F) liquid (G) live (H) from drowning

Ex Output:
D


Ex Input:
Fact1: cross-pollination increases genetic diversity, Fact2: Evolution requires genetic diversity., Question: What does evolution require? (A) Time and energy (B) Plant reproduction (C) cross-pollination (D) Reproduction (E) gene flow (F) coded genes (G) circulatory systems (H) animals with backbones

Ex Output:
C


Ex Input:
Fact1: if soil is permeable then water easily flows through that soil, Fact2: Gourdin soils have slow permeability., Question: What does water easily flow through? (A) calcite (B) streams (C) gourdin (D) Sediment (E) cactuses (F) watershed (G) streams. (H) crust

Ex Output:

C