Step-by-step explanation:
The sentence that is an example of dramatic irony is C. "The man innocently goes to the closet door; the audience knows he is in for a big surprise."
Dramatic irony occurs when the audience or reader knows something that the characters in the story do not, which creates tension or suspense. In this example, the audience is aware that the man is in for a surprise when he opens the closet door, but the man himself is unaware of what is about to happen. The contrast between the audience's knowledge and the man's ignorance creates dramatic irony and adds to the suspense of the scene.