In addition to a two-party system, there are still seve...
单项选择题In addition to a two-party system, there are still several minor parties, such as Libertarian Party, the Green Party and Constitution Party in the United States, __________________.
A．even though these minor parties have very practical importance
B．even though these minor parties have some practical importance
C．even though these minor parties have very little practical importance
D．even though these minor parties have no practical importance at all
