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.

---

Definitions:

Reliability

The degree to which an experiment, test, or measuring procedure yields the same results on repeated trials, indicating consistency and dependability.

Market Definition

The process of characterizing the boundaries of a market, including potential customers and competing products, to understand its dynamics and size.

Effective

Having the intended or expected outcome; the ability to achieve specific goals or results.

Fixed

Costs or expenses that do not change with the level of goods or services produced within a certain time period.