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: 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: Producers make food from inorganic molecules., Fact2: Autotrophs absorb sunlight energy and transfer inorganic mineral nutrients into organic molecules., Question: What do producers turn sunlight into? (A) energy (B) apples (C) heat (D) paper (E) drinks (F) waste (G) inorganic goods (H) food
[A]: H


[Q]: Fact1: Birds are endothermic tetrapod vertebrates., Fact2: Birds and mammals are endothermic., Question: what are endothermic? (A) bacteria (B) sharks (C) dinosaurs (D) organs (E) brains (F) animals (G) crocodiles (H) mammals
[A]:
H