A Critical Difference in Prospective and Retrospective Memory Is That

A critical difference in prospective and retrospective memory is that

A) retrospective memory is explicit,and prospective memory is implicit.
B) in retrospective memory,there is typically an explicit cue to remember;in prospective memory,there isn't.
C) retrospective memory requires that a person "remember to remember";prospective memory doesn't.
D) only retrospective memory plays a role in action slips;prospective memory isn't involved.