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: satellites are used to take images from space, Fact2: Images of Earth taken from space., Question: Images of Earth are taken by (A) satellites (B) light (C) Communication (D) millions (E) radar (F) Plate tectonics (G) moving plates (H) lamphreys
A

Fact1: Blood is a fluid connective tissue., Fact2: Blood carries oxygen to the brain., Question: What transports oxygen to the brain? (A) microscopic organisms (B) some prokaryotes (C) feedback mechanisms (D) chemical messengers (E) animals with backbone (F) aquatic organisms (G) a fluid connective tissue (H) prokaryotic cells

G