What happens when a helper T cell is activated?

Multiple Choice

Two populations of cells are formed: helper $T$ cells and cytotoxic $T$ cells; the $T_H$ cells activate $B$ cells and the $T_C$ cells target virus$-$infected cells.

Two populations of cells are formed memory $T_H$ cells and effector $T_H$ cells, the effector $T_H$ cells produce a variety of antibodies.

Two populations of cells are formed memory $T_H$ cells and effector $T_H$ cells; the effector $T_H$ cells play a role in activating B cells.

Two populations of cells are formed effector $T_H$ cells and effector $T_C$ cells, these work together to activate B cells and macrophages.

Activated $T_H$ cells produce cytokines that stimulate dendritic cells, converting them into antigen$-$presenting cells.

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