Which of the Following Statements Concerning Immunity Is Correct

Multiple Choice

Which of the following statements concerning immunity is correct?

A) Adaptive immunity responses to pathogens improves over time due to generation of memory, which includes an increase in the number of lymphocytes that respond faster than during the original infection.
B) Adaptive immunity demonstrates memory, meaning each lymphocyte responds to a particular pathogen, but responds similarly with each infection.
C) Adaptive immunity demonstrates specificity, which means that lymphocytes only destroy viruses and ignore all other types of pathogens.
D) All of the choices are correct.