Answer:
a. Eocene primates that are the earliest anthropoids
Explanation:
The answer is
a. Eocene primates that are the earliest anthropoids.
Basal anthropoids are the Eocene primates that are the most primitive anthropoids existed.
Primates are referred as an order of animals or mammals that are characterized by their large brains and their complex behavior. This includes apes and primitive humans.
Thus the answer is --
a. Eocene primates that are the earliest anthropoids