What Was One Reason for Which Traditional Nationalism Came Under

What was one reason for which traditional nationalism came under mounting pressure during the middle of the twentieth century?

A) Its chief tenets were increasingly at odds with the social reality of Quebec.
B) Its chief tenets were increasingly at odds with the cultural reality of Quebec.
C) Its chief tenets were increasingly in keeping with the political reality of Canada at large.
D) Its chief tenets were increasingly in keeping with the economic reality of Quebec.
E) Its chief tenets were increasingly at odds with the political reality of Quebec.