Multiple Choice
Macrophages secrete ________ which then activates ________ .
A) antibodies ; helper T cells
B) interleukin-1 ; cytotoxic T cells
C) interleukin-1 ; helper T cells
D) interleukin-2 ; cytotoxic T cells
E) interleukin-2 ; helper T cells
Correct Answer:

Verified
Correct Answer:
Verified
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