Answer:
B. Monarchy
Step-by-step explanation:
As you already know, the monarchy is a form of government where a monarch has complete political, social and economic power in the entire territory dominated by him. Everything the monarch says has to be followed by his sudites, who must even follow the religion that the monarch determines, follow the customs that the monarch has and speak the language that the monarch determines.
In this case, we can state that when the French forced the inhabitants of their colonies to use the French language and culture, they were showing an example of monarchy.