Answer: D. kangaroo, rhesus monkey, and humans
All of those animals are mammals, which are the only animals with mammary glands. The term "mammary" comes from "mammal".
A turtle is a reptile, and a bullfrog is an amphibian. So this rules out choice A. Choice B is ruled out for similar reasons, and because a tuna is a fish and not a mammal.
Choice C is ruled out because none of the animals listed here are mammals.