Q: Fact 1: Chordates have a complete digestive system and a closed circulatory system. Fact 2: Chordates Chordates Chordates include fish, amphibians, reptiles, birds, and mammals. Given the two facts above, what kind of circulatory system do fish have?

Choose your answer from:
[I] open.
[II] solid.
[III] closed.
[IV] three.
[V] stagnant.
[VI] kinetic.
[VII] complex.
[VIII] gills.
A:
[III]