Mammals
A) have a four-chambered heart and double circulation.
B) are amniotes in which epidermal hair is present at some stage of development.
C) have mammary glands which provide food for the young.
D) are endothermic.
E) All of the answers are correct.

Question

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The Answer of Mammals
A) have a four-chambered heart and double circulation.
B) are amniotes in which epidermal hair is present at some stage of development.
C) have mammary glands which provide food for the young.
D) are endothermic.
E) All of the answers are correct.