T-lymphocytes secrete to stimulate the proliferation of b-lymphocytes.

There are choices for this question namely:

A) Antigens
B) Antibodies
C) Cytokines
D) Agglutinins
E) Allergens

The correct answer is "cytokines". These helper T cells secrete cytokines that will stimulate the B cells into differentiating to plasma cells. These plasma cells will then produce antibodies to combat the offending agent depending on the antigen presented.

Ithink due to shortage of water

D. china is one of the most active places, which could quite possibly mean more agriculture will happen.. and more war machi-    best of luck comrade.