Given the task definition and input, reply with output. 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: Flowers produce spores that develop into gametophytes., Fact2: All gametophytes are haploid., Question: Flower spores eventually develop into an entity that is: (A) sperm (B) fertile (C) mammalian (D) ferns (E) fungi (F) development (G) haploid (H) plants
G