What Is the Major Advantage of the Adaptive Immune System

Multiple Choice

What is the major advantage of the adaptive immune system?

A) The intensity of the immune response is decreased when a foreign agent is detected a second time because the immune system recognizes the foreign agent from a previous encounter.
B) It has higher specificity than the innate system because it can identify which immune cells produce the correct antibodies and amplify those cells.
C) All features of the adaptive immune system are the same in all vertebrates.
D) A and B are equally advantageous.