Why Aren't Ideological Contests in America Like Those in Europe

Why aren't ideological contests in America like those in Europe?

A) because most Americans share many of the same fundamental beliefs
B) because there are too many parties to have any kind of coherent ideological arguments in Europe
C) because the party system is so much older in Europe that most of the parties' ideological differences have been ironed out
D) because our two-party system is much more contentious than that of the multiparty systems in Europe
E) because partisan politics doesn't exist in Europe