The Fight Against Repeat Pathogen Invasions Is More Efficient with Every

The fight against repeat pathogen invasions is more efficient with every encounter because _________. (Select all that apply)

A) the specific memory cells undergo another clonal expansion upon pathogen activation making an even larger army
B) the stem cell-like nature of memory cells performs self-renewal, gradually enlarging the army size between attacks
C) genomic repositioning within memory cells enhances their ability rapidly produce effector T cells
D) memory T cells convert to plasma cells