Use the Following Information to Answer the Next Few Questions

question 91

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.

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The act of promoting or defending a cause, principle, or policy in the public arena.

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Acts carried out by individuals or groups with the intention of changing or influencing social conditions or policies.

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The activity of attempting to influence decisions made by officials in the government, often by special interest groups or professional lobbyists.