A boycott is the refusal to purchase specific items in protest, usually towards the government
Give a man a fish, he eats for a day. Teach him how to fish, he can eat for life.
:)
That is the correct way to use ostrasize, if that's what youre asking.
Answer:
<em>C. the nation, and since then,</em>
Exclamation: If you're joining two sentences together you need a comma to do so. By placing a comma after "nation" and "then" you are making a run-on sentence.