Which of the following definitions best describes an antibody?

A)A substance which,when introduced into the body,stimulates phagocytosis.
B)A protein produced by the body in response to tissue injury.
C)A glycoprotein produced by macrophages in response to an antigen.
D)A protein produced by lymphocytes when an antigen is introduced into the body.
E)A polysaccharide that stimulates the immune response.