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: plant requires seed dispersal for reproduction, Fact2: Reproductive investment was measured as seed mass, samara size, and dispersal ability., Question: What requires investment, seed mass, size and dispersal? (A) plants (B) Species (C) animals (D) coral (E) Oak (F) gene flow (G) Frogs (H) mussels
[A]: A


[Q]: Fact1: Fertilization of gametes produces a diploid zygote., Fact2: Sperm and egg nuclei combine to form the diploid zygotic nucleus 2., Question: Sperm and egg nuclei combine to do what? (A) combine genes (B) rapid expansion (C) fertilize gametes (D) reproduce (E) allow growth (F) build proteins (G) spread flower seeds (H) remove eggs
[A]:
C