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: Echinoderms lack respiratory and excretory systems., Fact2: All echinoderms are deuterostomes ., Question: some what lack respiratory systems? (A) Smoking (B) respiratory systems (C) deuterostomes (D) cigarettes (E) alpacas (F) hawks (G) barnacles (H) pigs
C