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: 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: insect bites cause harm to living things, Fact2: Iguanas are a lot like dogs, people and other living things., Question: What can an insect to do cause harm to people? (A) humans (B) Injury (C) Bite an iguana (D) Bite a dog (E) deadly (F) Bite (G) death (H) Bite an insect

Ex Output:
F


Ex Input:
Fact1: heat and pressure change the remains of prehistoric living things into natural gas, Fact2: Dinosaurs and Other Prehistoric Creatures Dinosaurs are just one group of prehistoric animals., Question: what remains are changed into natural gas by heat and pressure change? (A) oxygen (B) dinosaurs (C) bacteria (D) skull (E) clouds (F) humans (G) fossil fuels (H) sea squirts

Ex Output:

B