The modern two-party system consists of the "Democratic" Party and the "Republican" Party.
Explanation:
Today, America is a multi-party system. The Democratic Party and the Republican Party are the most powerful. Yet other parties, such as the Reform, Libertarian, Socialist, Natural Law, Constitution, and Green Parties can promote candidates in a presidential election.
The answer is B. "Estudiante" is not correct because it is the singular form for student, while the rest of the sentence is in plural. The correct form of the sentence is "Las estudiantes son inteligentes".