Answer:
B.) The audience sees the killer hiding behind the door, but the character is unaware until it is too late.
Explanation:
Dramatic irony is when the audience knows what will happen/something the characters do not know.
When this happens, the irony is that something will happen but the characters cannot see it coming.
In this example, the audience can see the killer, but the characters cannot. This raises both tensions and the irony regarding the fact that the characters will not know until it is too late.
(Definition: a literary technique, originally used in Greek tragedy, by which the full significance of a character's words or actions are clear to the audience or reader although unknown to the character.)
