Answer:
The correct answer is option B.
Explanation:
Protists are not monophyletic, meaning that they did not represent a single, whole branch of the common life form.
A paraphyletic group is the group of some descendants of a common ancestor. Protists are considered a paraphyletic group.
Example of the monophyletic group is mammals as each and every mammal share a common single ancestor that is not shared by another group of organism.
Thus, the correct answer is option B.