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: All life relies on a relatively narrow range of pH, or acidity., Fact2: Human life is dependent life., Question: what relies on a relatively narrow range of acidity? (A) gravity (B) mammals (C) animals (D) trees (E) humans (F) density (G) volume (H) potatoes
E

Fact1: if a thermal conductor is exposed to a source of heat then that conductor may become hot, Fact2: Copper is a great thermal conductor., Question: What becomes hot when exposed to a source of heat? (A) rubber (B) wool (C) an object (D) copper (E) paper (F) sugar (G) the skin (H) our star
D

Fact1: Pressure receptors are found mainly in the skin., Fact2: Some receptors are free nerve endings., Question: Where can free nerve endings be found? (A) eardrum (B) Localized damage (C) on the Sun (D) mouth of rivers (E) in the skin (F) heat or cold (G) in the fingernails (H) in bacteria

E