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: Streams may start with runoff or water seeping out of a spring., Fact2: Most water comes from precipitation., Question: What do most streams start with? (A) swamp vegetation (B) heat produced (C) loose dirt (D) Decibels (E) Veins and arteries. (F) matter vibrating (G) visible energy (H) precipitation
[EX A]: H

[EX Q]: 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
[EX A]: D

[EX Q]: Fact1: nectar is used for attracting pollinators by plants, Fact2: Pollinators: Bees are the primary pollinators of fennel., Question: what do plants use nectar to attract? (A) apples (B) humans (C) honey (D) birds (E) bees (F) animal (G) fruit (H) children
[EX A]:
E