-Refer to the Graph in the Exhibit

question 59

Multiple Choice

-Refer to the graph in the exhibit.Which of the following would represent an expansionary gap?  

• A) Y₂ - Y₁
• B) Y₃ - Y₁
• C) Y₂ - Y₃
• D) Y₂ + Y₁

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Definitions:

Activated T Cells

T lymphocytes that have been stimulated by an antigen to proliferate and carry out immune responses.

Cytotoxic

Referring to a substance or process which is toxic to cells, causing their damage or destruction.

Memory

the cognitive function that enables the storage and retrieval of information over time.

Anaphylaxis

A severe, potentially life-threatening allergic reaction that can occur rapidly.