I believe it was nineteen months.
Brief Definition:
A brief, short definition of Nationalism is A belief that your country is better than others.
Full Definition:
A full definition would be an idea and movement that promotes the interests of a particular nation, especially with the aim of gaining and maintaining the nation's sovereignty over its homeland.
Different type of ways....
I would say that your answer is b. to persuade. Hope this helps and have a nice day!