Monkeys and humans share many of the same DNA sequences and have similar proteins, indicating that

a ... the two groups belong to the same specie

b ... the two groups share a relatively recent common ancestor

c ... the two groups first appeared on Earth at about the same time

d ... monkeys evolved from humans

I think it's will be Ayes

B. The two groups share a relatively recent common ancestor.

(A. Cannot be true because human and monkeys are not that closely related

C. Cannot be true because it is not explicitly indicated by the DNA evidence provided by the excerpt

D. Cannot be true because monkeys would be extinct if human replaced them)