The correct answer is option (D):
Aggravate
The correct answer is "Aggravate."
The word "pacify" means to bring peace to, to calm, or to soothe someone who is angry or upset. It implies making a situation or person more tranquil.
The antonym, therefore, needs to represent the opposite action – to make something worse, to intensify a negative feeling, or to provoke. "Aggravate" fits this definition precisely. It means to make a problem, injury, or offense worse or more serious. It directly opposes the idea of calming or soothing.
The other options don't have the opposite meaning:
* Operate, Direct, Execute, and Advise are not antonyms of "pacify." These options deal with taking action or giving guidance, whereas "pacify" involves the act of reducing tension.