In the figure below, why is the antibody response stronger after the second exposure to the antigen? Antibody (to A) concentration carbitrary units) 101 First exposure 10% to antigon A 107 101 Second exposure to antigen A J 14 21 28 35 42 49 56 Time (days) 100 0 7 The antigenicity may bave mutated between the first and second exposure to become more antigenic O After the first exposure, memory B cells were created that were standing by in case of a second exposure to the same antigen. The first response was due to innate immunity, while the second response was due to acquired immunity. The antibodies created following the first exposure are still present