instruction:
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").
question:
Fact1: Cells are the basic units of the structure and function of living things., Fact2: Tigers are the largest of the living cats., Question: Cells are the basic units of the structure and function of what? (A) water (B) mammals (C) ice (D) tigers (E) animals (F) humans (G) plants (H) the Sun
answer:
D

question:
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
answer:
B

question:
Fact1: erosion causes a river to become deeper and wider, Fact2: On the contrary, the NILE is the longest river in Africa., Question: If eroded the Nile would become what? (A) imbalanced (B) Plant growth is reduced (C) detritus (D) colder and wetter (E) Sediment (F) solid, liquid, gas (G) deeper and wider (H) dormant state
answer:
G