Answer:
The answer is D) Protists.
Explanation:
A contractile vacuole is a cellular vacuole filled with a clear liquid present in the protozoa and in some lower metazoans. The protozoa are microscopic organisms, unicellular pertenescent to the protist kingdom, which is the kingdom that contains all those eukaryotic organisms that cannot be classified within any of the other three eukaryotic kingdoms.
