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: a greenhouse is used to protect plants by keeping them warm, Fact2: With lots of rain and a warm climate, plants grow well., Question: What does a greenhouse help plants do? (A) Park cars (B) Start panicking (C) reproduce (D) growth (E) Bloom slower (F) adding heat (G) Regrows it (H) Grow well
[EX A]: H

[EX Q]: Fact1: a rainbow is formed by refraction of light by separating light into all different colors, Fact2: Introduction A rainbow is often given as an everyday example of a spectrum., Question: A spectrum is formed by refraction of light by separating light into all different what? (A) categories (B) dyes (C) photons (D) pigments (E) light (F) colors (G) Energy. (H) energy
[EX A]: F

[EX Q]: Fact1: riding a bike does not cause pollution, Fact2: Visual pollution caused by littering is pollution, just as is water pollution and air pollution., Question: What is not caused by riding a bike? (A) momentum (B) flooding (C) coal (D) disease (E) speed (F) Allergies (G) litter (H) exercise
[EX A]:
G