Use the Following Information to Answer the Next Few Questions

Multiple Choice

Use the following information to answer the next few questions.
An otherwise healthy student in your class is infected with EBV, the virus that causes infectious mononucleosis. The same student had already been infected when she was a child, at which time she had merely experienced a mild sore throat and swollen lymph nodes in her neck. This time, though infected, she does not get sick.
-Her immune system's recognition of the second infection involves the

A) helper T cells.
B) memory B cells.
C) plasma cells.
D) cytotoxic T cells.
E) natural killer cells.