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: Organisms cluster around hydrothermal vents in the ocean floor., Fact2: To survive, some organisms living near hydrothermal vents have formed close associations., Question: How is survival ensured around hydrothermal vents? (A) heat produced (B) Eating a lot (C) Reproducing quickly (D) biological diversity (E) vegetation (F) Being in a cluster (G) Staying far apart (H) hydrate their cells
[A]: F


[Q]: Fact1: vinegar can cause harm to the eyes, Fact2: Vinegar is dilute acetic acid., Question: What can acetic acid do to the eyes? (A) treat cataracts (B) harm them (C) Relieve pain (D) Dehydration (E) kill them (F) hydrate them (G) protect them (H) cleanse them
[A]: B


[Q]: Fact1: a solution is formed by one substance being dissolved in another substance, Fact2: Salinity refers to salts dissolved in water., Question: What are the two ingredients of a saline solution? (A) salt and water. (B) Deoxyribonucleicacid (C) water and iodine (D) looseness (E) Veins and arteries. (F) salt and calcium (G) salt and oxygen (H) deoxyribonucleic acid
[A]:
A