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: 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: extreme heat and pressure change rock into metamorphic rock, Fact2: Marble is a form of metamorphic rock., Question: What is formed from extreme heat and pressure? (A) glass (B) marble (C) crust (D) soils (E) coal (F) sugar (G) calcite (H) arteries
B

Fact1: loud noises can cause animals to startle, Fact2: Fireworks that only make a loud noise are called firecrackers., Question: What could cause an animal to startle? (A) Firecrackers (B) Going into hibernation (C) an object (D) Electrical energy (E) an electric stove (F) Gathering food (G) Seeing prey (H) vehicles

A