Individuals with Bare Lymphocyte Syndrome Lack MHC II Proteins

Multiple Choice

Individuals with bare lymphocyte syndrome lack MHC II proteins.Which of the following could still occur in an individual lacking MHC II proteins?

A) Helper T cells could use T-cell receptors to interact with macrophages.
B) B cells could produce IgM antibodies.
C) Cytotoxic T cells could become activated.
D) B cells could undergo class switching independently.