Which of the following would result in cognitive dissonance?

A) I believe smoking is bad for my health; I love to smoke.
B) I believe exercising is healthy; I love to exercise.
C) I believe dresses are feminine; Nicole Kidman sometimes wears pants.
D) I believe profanity is childish; my father uses profanity.

Cognitive dissonance occurs when two beliefs or behaviors contradict each other, causing discomfort or tension. In option A, the belief that smoking is bad for health contradicts the behavior of loving to smoke, resulting in cognitive dissonance. Option B shows consistency between belief and behavior, option C only presents a piece of information that could be interpreted in different ways, and option D does not necessarily create a contradiction between beliefs and behaviors.