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: Adult sponges are sessile., Fact2: Most echinoderms are sessile or sedentary marine forms with radial symmetry as adults., Question: What are sedentary? (A) barnacles (B) fish (C) fur seals (D) animals (E) adult sponges (F) chickens (G) gazelles (H) birds
A:
E