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 Q]: 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 A]: D

[EX Q]: Fact1: Flagella help prokaryotes move., Fact2: Most prokaryotes are unicellular., Question: What helps unicellular organisms move? (A) evaporation (B) bacteria (C) heat energy (D) glucose (E) sweating (F) flagella (G) legs (H) blood
[EX A]: F

[EX Q]: Fact1: Most carcinogens cause cancer by producing mutations in DNA., Fact2: Lung cancer is the deadliest of all cancers., Question: what cause production of mutations in DNA of areas such as lungs (A) Damages them (B) the environment (C) carcinogens (D) cigarettes (E) rays or beams (F) smoking tobacco (G) smoking (H) Pollution
[EX A]:
C