Which of the Following Best Describes Why the Secondary Response

Multiple Choice

Which of the following best describes why the secondary response to an antigen is faster than the primary response?

A) The secondary response uses memory cells, which immediately release antibodies specific to the antigen.
B) The secondary response uses memory cells, which immediately release antigens specific to the antibodies.
C) The primary response uses B and T cells specific to the antigens.
D) The secondary response has fewer steps than the primary response, allowing it to progress faster.