Detailed Instructions: 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: Flagella help prokaryotes move., Fact2: Cilia and flagella are composed of microtubules., Question: Microtubules help prokaryotes _. (A) live (B) dense (C) store (D) grow (E) work (F) move (G) growth (H) ferns
A:
F