After Confederation,it Was Assumed That Future French- and English-Speaking Groups

After Confederation,it was assumed that future French- and English-speaking groups would co-exist.Why did the French struggle for cultural survival until World War II?

A) A series of epidemics,including smallpox,reduced the French population.
B) There was a drop in the French birth rate and a corresponding rise in the British birth rate.
C) There were several civil wars between the British and the French.
D) English-speaking Canadians controlled the major economic institutions throughout Canada,including Quebec.