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: Flagella help prokaryotes move., Fact2: Flagella and cilia are similar in structure., Question: something what to cilia help prokaryotes move. (A) it needs them (B) Chemical energy (C) similar in structure (D) It helps them survive (E) it keeps an organism warm (F) major threat to health (G) An object is seen (H) The bending of a ray of light
C