Napoleon's reign made Europe eager to restore monarchies because they believed that with new monarchies it would meet the common peoples and political peoples demand for reform. Since Napolean was more tyrannical than other leaders before him he was aligned with the peoples common leader/monarch.
The reason why the British intervenes in Haiti is mainly because they are a long term enemy of France, which was Great Britain's allies. The invasion of the European people in the Haitian land lead into a Haitian Revolutionary War (which was for anti-slavery and anti-colonial.)
The answer is,
C. Country B.
Country B is France and they are talking about the French Revolution.
-Mabel <3