Final answer:
In America, political parties are expected to promote the common good by working collaboratively for public welfare, creating platforms that appeal to the electorate, and implementing policies that serve society after winning elections.
Step-by-step explanation:
Political parties are expected to work collaboratively for public welfare in order to promote the common good in America. This entails political parties engaging in collective action, creating platforms that appeal to a broad range of voters, winning elections, and once in power, implementing policies that deliver on the preferences of their supporters. For example, the Democratic Party and the Republican Party both create and promote their platforms which include a collection of policy positions (known as planks) that reflect their party's values and proposed solutions to societal needs. While the overarching goal is to win elections, the crucial work of setting public policy comes as a result of political parties nominating candidates, coordinating political campaigns, and mobilizing voters to achieve electoral success.
At the heart of the American political system, parties are expected to solve collective action problems by working together for the enactment and implementation of policies that serve the broader society and address real-world issues. The correct answer to the question is D) Work collaboratively for public welfare.