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").

Q: Fact1: soil is formed by weathering, Fact2: Over time, the slow processes of weathering and erosion can turn large rocks into sand., Question: What is formed by erosion processing large rocks? (A) cracks (B) crust (C) Newton (D) roots (E) pan (F) soil (G) potash (H) biome

A: F
****
Q: Fact1: Veins generally carry deoxygenated blood., Fact2: Arteries and veins are blood vessels., Question: Arteries in the body are able to carry what? (A) saliva (B) breathe (C) water (D) Air (E) oxygen (F) blood (G) veins (H) liquid

A: F
****
Q: Fact1: HIV infects and destroys helper T cells., Fact2: Scientists agree that HIV causes Aids., Question: What infects and destroys helper T cells? (A) swea (B) Wasps (C) AIDS (D) CO 2 (E) PDAs (F) humans (G) heat (H) anemia

A:
C
****