Adaptive Immunity Is Sometimes Also Called Acquired Immunity

Adaptive immunity is sometimes also called acquired immunity. Which of the following statements provides a basis for the alternative name?

A) To become activated, lymphocytes require exposure to the antigenic determinant for which they are specific.
B) Lymphocytes of the adaptive immune system are highly specific for a single antigenic determinant.
C) Activated lymphocytes produce daughter cells that are identical in specificity and function.
D) Activated lymphocytes may persist for years in the body.
E) Lymphocytes reactive to normal body components are removed.