Antonym of PACIFY

Answer: Option A

Pacify : quell the anger, agitation, or excitement of.
Quarrel : a heated argument or disagreement, typically about a trivial issue and between people who are usually on good term.
Challenge : a call to someone to participate in a competitive situation or fight to decide who is superior in terms of ability or strength.
Threaten : state one's intention to take hostile action against (someone) in retribution for something done or not done.
Darken : make or become dark or darker.

Antonym of Pacify is Quarrel