You are presented with the quiz "Adult urochordates are _-shaped." But you don't know the answer, so you turn to your teacher to ask for hints. He says that "adult tunicates are barrel-shaped" and "urochordates are commonly called tunicates". So, what's the best answer to the question?
Possible answers: A. Length; B. a prism; C. fossils; D. grow; E. barrel; F. fertile; G. Grow well; H. revolving;
Answer:
E.