What makes the kingdom Protista unique?

A. Protists are single celled
B. Protists are not made of cells
C. Protists do not share a common ancestor
D. Protists share a common ancestor with fungi only

C. Protists do not share a common ancestor.

Protists are a diverse group of organisms that do not fit into any other kingdom classification, as they do not share a common ancestor with plants, animals, or fungi. They are a unique group of organisms that can be single-celled, colonial, or multicellular.