Social studies?

"Without our two great political parties cutting accross economic and geographic interests ,democracy as we know it could never have been made to function". The author of this ststement probably meant to suggest that. A)Political parties in the United States tend to represent sectional interests B)Each political party system can function in a democracy C) There is no significant difference between the democratic and D) Only a two-party system can function in a democracy E)An important feature of the U.S political system is the broadly appeal of the two political parties