Multiple Choice
Immunological theories of aging argue that ______.
A) the immune system is preset to decline by an internal biological clock
B) the immune system is preset to grow by an internal biological clock
C) the immune system is capable of refreshing itself as a result of positive lifestyle changes
D) the immune system is capable of responding to infections independent of a person's age
Correct Answer:
Verified
Correct Answer:
Verified
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