Which phrase best explains how playwrights use dramatic irony? A. to teach the audience a lesson
B. to demonstrate how people really feel
C. to increase audience interaction
D. to create humor or suspense

to demonstrate how people really feel.

Explanation:

Dramatic irony is a form of irony that is expressed through a work's structure: an audience's awareness of the situation in which a work's characters exist differs substantially from that of the characters', and the words and actions of the characters therefore take on a different—often contradictory—meaning

i believe the answer is d : )