Answer: C) Obese participants will question the validity of the information provided.
Step-by-step explanation:
According to the theory of the cognitive dissonance, when the attitudes of the individuals are incongruent to the behavior, this leads to the cognitive dissonance. To remove the cognitive dissonance, the person can either change the attitude or the behavior or the person can adjust the attitude in accordance with the behavior.
Thus obese participants are likely to question about the validity of the information regarding the healthy diet. This is because of the fact that their attitude is against their behavior of eating hence, they may not obtain the benefits of the healthy diet.