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: a plants require water for survival, Fact2: Water contains hydrogen and oxygen., Question: What do plants require for their survival? (A) Light (B) Proteins (C) Energy. (D) salinity (E) hydrogen (F) nutrients (G) sunlight (H) food
[A]: E


[Q]: 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
[A]: B


[Q]: Fact1: conserving water can be used for survival in a dry environment, Fact2: Deserts are usually very, very dry., Question: What can be used for survival in the desert? (A) nutrients (B) shade (C) food and shelter (D) salt and water. (E) heat (F) picnics (G) Conserving water (H) Chemical energy
[A]:
G