Luis picks up a pack of cigarettes and reads, "Cigarette smoking is harmful to your health." Which one of the following statements leads one to believe Luis is actually having cognitive dissonance?

A) "I've been smoking my whole life and I don't have health problems."
B) "No one I know who smokes is sick."
C) "I know these cigarettes are killing me but I just can't stop."
D) "That is not true. Cigarettes are not that harmful."

Cognitive dissonance occurs when a person experiences psychological discomfort or tension caused by holding two opposing beliefs or values. In this scenario, reading the warning label on the cigarettes and continuing to smoke despite knowing the harmful effects is an example of cognitive dissonance. Option C indicates that Luis is experiencing this as he acknowledges knowing the harmful nature of smoking but is struggling to stop. Options A and B may indicate rationalization or denial, while option D is an outright dismissal of the factual information.