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").

Fact1: lightning can cause a forest fire, Fact2: Forest fires are bad for the environment., Question: Lightning can be bad for what? (A) the environment (B) rainstorms (C) destruction (D) visibility (E) thunder (F) the sun (G) The weather. (H) transportation
A

Fact1: Skin color is another polygenic trait., Fact2: Most dental variations are polygenic, that is controlled by several genes., Question: Skin color is a trait controlled by what? (A) prokaryotic cells (B) one gene (C) enzymes (D) keratin (E) one's descendants (F) several genes (G) the environment (H) a single gene
F

Fact1: Most people can survive only a few days without water., Fact2: Water is everywhere H20., Question: What do most people need at least a little of every few days to survive? (A) NACL (B) UV (C) mL (D) oxygen (E) corn (F) H20 (G) rest (H) Hydrogen

F