What has a water vascular system with tube feet?
Options:
- (A) humans
- (B) blastoids
- (C) bushes
- (D) orchids
- (E) Most plants
- (F) ferns
- (G) bacteria
- (H) the Sun OK. Let's think hard:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Echinoderms have a unique water vascular system with tube feet. Echinoderms in the diorama include the crinoids and blastoids. Blastoids have a unique water vascular system with tube feet.
So, the final answer is (B).