What is a cognitive dissonance explanation for results found by Festinger and Carlsmith

Question

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Festinger and Carlsmith's experiment found that when participants were offered $1 to lie about a task they found boring, they experienced cognitive dissonance because they had insufficient justification for their behavior. However, when participants were offered $20 to lie, they had sufficient justification for their behavior, which reduced their cognitive dissonance. This is known as the justification of effort. Therefore, option B is the best choice, as it correctly identifies that participants paid $20 to lie had sufficient justification for their behavior and experienced little dissonance.

What Is a Cognitive Dissonance Explanation for Results Found by Festinger