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: natural disasters can cause animals to leave an environment, Fact2: And like fire, flooding is a common and widespread natural disaster., Question: What can cause animals to leave their environment? (A) predators (B) rainfall (C) space travel (D) flooding (E) drought (F) mines (G) wind (H) weather

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: Energy is passed up a food chain or web from lower to higher trophic levels., Fact2: An example of chemical energy is food nutrients., Question: _ are passed from lower to higher trophic levels (A) fossil fuels (B) rays or beams (C) nutrients (D) environment (E) animals (F) heat produced (G) Most plants (H) Light

Ex Output:
C