What Major Advantage Is Conveyed by Having a System of Acquired

Multiple Choice

What major advantage is conveyed by having a system of acquired immunity?

A) It enables a rapid defense against an antigen that has been previously encountered.
B) It enables an animal to counter most pathogens almost instantly.
C) It allows for extremely precise specificity for defense against antigens.
D) All of the above answers are correct.
E) Answers A and C are both correct.