Final answer:
A) The innate immunity responds quickly and nonspecifically to pathogens, whereas the adaptive immunity specifically responds to unique antigens but is slower to take effect.
Step-by-step explanation:
The correct letter describing how innate immunity and adaptive immunity each respond differently to exposure to the influenza virus is a. Innate immunity is nonspecific, meaning it responds quickly to pathogens in the same general manner.
while adaptive immunity is specific, responding to unique antigens, but operates more slowly. The former can be thought of as the body's immediate and general defense against pathogens, which includes physical barriers like skin and mucous membranes, and immune cells that act fast but without specificity.
In contrast, the latter refers to immunity developed over time through exposure to specific antigens, involving a sophisticated process where B cells and T cells recognize and remember particular antigens for a faster response upon reexposure.