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").
Problem:Fact1: Adult tunicates are barrel-shaped., Fact2: Urochordates are commonly called tunicates., Question: Adult urochordates are _-shaped. (A) Length (B) a prism (C) fossils (D) grow (E) barrel (F) fertile (G) Grow well (H) revolving
Solution:
E