Extracellular pathogens such as viruses and bacteria in body fluids are attacked by .a. cytotoxic T cells b. antigens c. helper T cells d. antibodies from plasma cellse. complement proteins

D.antibodies from plasma cells

Explanation:

The immune system of the body helps to protect the body by fighting foreign bodies such as bacteria and virus. The immune system with the help of the antibodies which are found in plasma cells attack the foreign bodies and kill them.

the fossil record provides evidence of a common ancestor to many species.