Cognitive Dissonance Theory Suggests That the Best Way to Shift

Cognitive dissonance theory suggests that the best way to shift someone's belief that climate change is no big deal would be

A) presenting them with evidence from experts.
B) paying them $500 to switch to energy-conserving light bulbs.
C) putting them in a group of people with even less concern about climate change.
D) having them read statements they disagree with in front of a classroom.