The correct answer is A) dramatic irony.
The other options of the question were B) foreshadowing. C) imagery. D) flashback.
The literary technique of dramatic irony happens when the audience already knows something but the character of the play ignores. The author of the play uses this literary technique when it wants to add suspense or create humor because the audience knows that something is going to happen but the character of the play is unaware of the situation.