The Two-Party System Has Worked in the United States,but Not

 The two-party system has worked in the United States,but not in Europe,because 

A)  Americans are more aggressive and less deferential. 
B)  fewer Americans want to participate in party activities. 
C)  Americans agree on enough issues to form broad coalitions. 
D)  Americans are more economically conservative than Europeans. 
E)  Europeans are less ideological than Americans.