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: Plants respond to daily and seasonal cycles and to disease., Fact2: Cactuses are one type of succulent plants, although they are usually referred to separately., Question: what responds to daily and seasonal cycles and to disease? (A) bees (B) insects (C) resistance (D) agriculture (E) humans (F) tortoises (G) cactuses (H) vegetation
G