How Is Subliminal Priming Accomplished in Most Studies

How is subliminal priming accomplished in most studies?

A) Participants wearing headphones hear whispered information in the background while they are asked to focus on particular images.
B) Participants are asked to think about whatever word comes to mind first when they are shown a certain image.
C) Information is presented to participants for about 10-100 milliseconds
D) Information is presented to participants for about 5 milliseconds