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: sunlight and rain can cause a rainbow, Fact2: Liquid precipitation is measured with a rain gauge., Question: What can cause a rainbow? (A) photosyntehsis (B) tornadoes (C) sun and hot weather (D) snowfall and fog (E) chemical messengers (F) sun and liquid precipitation (G) algae and plants (H) photosynthetic pigments?
A:
F