Answer:
The formation of a "coalition" government.
Explanation:
According to a different source, these are the options that come with this question:
One key difference between the U.S. system of government and a multiparty system of government is that in the U.S. system, coalition governments cannot be formed. A coalition government is a form of government in which political parties cooperate. This reduces the risk of dominance of a single party. Coalitions are usually formed in countries that operate under the principle of proportional representation, as most of the time, no political party can achieve a majority on its own.