The Long-Term Viability of Mexico's Smaller Parties Is Limited Due

The long-term viability of Mexico's smaller parties is limited due to the fact that

A) they have been unable to form alliances with the larger parties in national and state elections.
B) they lack a national following as smaller parties only have won seats in Mexico's regional legislatures.
C) Mexican law required parties to receive at least 2.5 percent of the vote in order to compete in future elections.
D) they never win seats in Mexico's Senate.
E) many Mexicans view a vote for one of Mexico's smaller parties as a wasted vote.