What Does the Success of the Liberal Party in the Twentieth

What does the success of the Liberal Party in the twentieth century demonstrate?

A) That interest aggregation is necessary in order for a party to win an election
B) That it is unnecessary that a party bring together all major groups or regions to be electorally successful
C) That it is seldom possible to avoid playing off one region against another in Canadian politics
D) That majority governments can be formed with little representation from the West
E) All of the above