Mussels have what?
Options:
- (A) seaweed
- (B) arms
- (C) Energy
- (D) a shell
- (E) warmth
- (F) bacteria
- (G) Length
- (H) legs
Hmmm, let me think. I don't want to be wrong, so I got to be careful.
Most mollusks have shells. Mussels are bivalve mollusks. Mussels have shells. The answer: (D).