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How do memory cells fight pathogens?
A. They respond to a future invasion of the same type of pathogen.
B. They release antibodies to protect the body.
C. They break down the pathogens that enter the body.
D. They produce antigens to protect the body.

What is the main goal of recommended dietary allowances (rdas)? to inspect school cafeterias across the united states to regulate foods sold at supermarkets and farmers' markets to investigate claims of tainted food being served in restaurants to indicate daily nutrient requirements