What is a defining feature of mammals that is not present in most other vertebrates? A. Mammals can produce milk for their offspring.

B. Mammals maintain a constant body temperature.

C. Mammals reproduce through internal fertilization.

D. Mammals have a nervous system with a spinal cord.

(Pls I need help!)

The correct answer is C. Mammals can produce milk for their offspring.

Mammals are the members of class mammalia. The word mammalia was derived from Latin word "mamma" which means "breasts" as they had a unique feature i.e. presence of mammary glands.

These glands were evolved from a special types of sweat glands and became specialized in the production of milk, especially in females.

They help the mothers in providing nourishment to the offspring.

Other features of mammals may include four chambered heart, hair and fur, three middle ear bones, etc.

Explanation:

answer; /// i believe the correct answer is (thrombocytopenia); (a)