According to the "new look" at cognitive dissonance,what decreases dissonance?

Question

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According to the "new look" at cognitive dissonance, people may not feel dissonance if they believe they can attribute discomfort to an external factor. This means that if people can find an external reason for their discomfort, they may not experience the dissonance they would otherwise feel. Options A and D are incorrect as they suggest that high levels of arousal and decreased consequences respectively increase dissonance. Option B is also incorrect as negative consequences that were not foreseeable may actually increase dissonance as it may create a feeling of regret or guilt.

According to the "New Look" at Cognitive Dissonance,what Decreases Dissonance