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").

[EX Q]: Fact1: Bivalves feed on plankton and nonliving organic matter., Fact2: Mussels are bivalve mollusks., Question: What feeds on plankton and nonliving organic matter? (A) barnacles (B) mollusks (C) animals (D) the Sun (E) sharks (F) graptolites (G) bacteria (H) dogs
[EX A]: B

[EX Q]: Fact1: if fossils of a water animal or plant are found in a place then that place used to be covered by water in the past, Fact2: Marine fossils found in the interior of the continent., Question: Why are marine fossils in the interior of a continent? (A) erosion from rivers (B) It used to be covered by water (C) They evolved to be land animal (D) basic building blocks of life (E) They washed ashore (F) the wearing away of rock (G) Land animals ate them (H) units of heredity
[EX A]: B

[EX Q]: Fact1: Producers are organisms that produce food for themselves and other organisms., Fact2: Humans can produce., Question: What can humans do for other organisms? (A) protect them (B) Provide food (C) interact (D) reproduce (E) Provide meaning (F) agriculture (G) Provide gods (H) Force to live forever
[EX A]:
B