Dramatic irony means that

a. the cosmos, state, family, and individual follow the same pattern.

b. the audience knows something the character or characters don't.

c. things are going to end very badly for someone.

d. everything works out in the end.

Dramatic irony means that (B) the audience knows something the character and characters don't.

This style of writing was often used in Greek literature. Readers can interpret the significance of the characters actions and words, something that the character himself or herself cannot.