Answer:
B. People are most likely to accept messages aimed at moderate attitude change.
Step-by-step explanation:
Assimilation-Contrast theory is a theory that shows changes in people's attitude and judgement. People are able to understand and make judgement based on the ideas that they are presented and the person's attitude are changed moderately based on the judgement.
People are willing to accept the ideas and information that are aimed at moderate attitude change.
Thus the answer is
B. People are most likely to accept messages aimed at moderate attitude change.