To measure T-cell response to a particular antigen,
a. the antigen is added to a purified population of T cells, and tritiated thymidine is added to measure T-cell proliferation
b. the antigen is added to T cells and antigen-presenting cells, and tritiated thymidine is added to measure T-cell proliferation
c. the antigen is added to T cells and antigen-presenting cells, and Chromium 51 is added to measure T-cell proliferation
d. mitogen and the antigen is added to mononuclear cells, and tritiated thymidine is added to measure T-cell proliferation
b. the antigen is added to T cells and antigen-presenting cells, and tritiated thymidine is added to measure T-cell proliferation
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