Question

Good day, please select all the correct options. Thanks

CD4 T-lymphocytes:

 A. are helper cells

 B. are activated by major histocompatibility complex (MHC) class I molecules. 

C. inhibit activation of B cells. 

D. stimulate B cells to switch the class of immunoglobulin expressed. 

E. are part of the innate immune response.

Answer 1

A. Are helper cells

D. stimulate B cells to switch the class of immunoglobulin expressed.