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").

Fact1: a plant requires sunlight for photosynthesis, Fact2: Ferns are one type of seedless plant., Question: what requires sunlight for photosynthesis? (A) roots (B) rice (C) sugar (D) caterpillars (E) humans (F) thermometer (G) ferns (H) trees
G