Correct Answer:
C. Pacify
The word "Placate" means to make someone less angry or hostile; to appease or calm. Among the given options, "Pacify" is the most accurate synonym, as it means to quell the anger, agitation, or excitement of someone, bringing them to a state of peace or calm. In contrast, "Rouse" means to awaken or provoke, which is an antonym. "Harass" means to subject to aggressive pressure or intimidation, which is unrelated to placating someone.