Which of the following is true about nonspecific resistance and specific immunity?
A. Specific immunity requires a prior exposure to a pathogen so the system can recognize the pathogen
B. Nonspecific defenses are widespread, meaning they work to fight many pathogens without prior exposure.
C. Nonspecific defenses work to fend off any pathogen in the same way every time the pathogen comes along in the body.
D. All of these statements are true.
Answer: D
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