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9. Activation of T lymphocytes is initiated when processed antigen binds to the T lymphocyte receptor on the cell membrane, and phospholipase C is activated. This results in production of which of the following components of signal transduction?

A ) Cyclic AMP

B ) Cyclic GMP

C ) Diacylglycerol

D ) Interleukin-2 (IL-2)

C)