Your Friend Asks You How Her B Cells "Know" When

Multiple Choice

Your friend asks you how her B cells "know" when to make antibodies. You tell her that B cells must become activated, and that she has another type of cell that assists in this. These are the 

A) TH cells that bind to the B cell and release cytokines that activate that B cell.
B) TC cells that bind to the B cell and release cytokines that activate that B cell.
C) TH cells that bind to the B cell and release cytokines that activate that T cell.
D) TC cells that bind to the B cell and release cytokines that activate that T cell.
E) TH cells that present the antigen to the B cell, leading to activation of that B cell.