A Secondary Immune Response Differs from the Primary Immune Response

A secondary immune response differs from the primary immune response in that:

A) it is more rapid than the primary response and results in higher antibody levels.
B) it is slower than the primary response and doesn't change the antibody levels.
C) it occurs at the same time as the primary response but results in a decrease in antibodies.
D) it only occurs in hyperallergic reactions and results in a decrease of antibodies.