FOMENT :

Answer: Option B

Extirpate :eradicate or destroy completely.
Isolation :the process or fact of isolating or being isolated.
Abrasion :the process of scraping or wearing something away.
Provoke :stimulate or give rise to (a reaction or emotion, typically a strong or unwelcome one) in someone.
Foment : instigate or stir up .

Synonym of Foment is Provoke.