Which activity represents a major role that political parties play in elections?

Selecting and supporting candidates who run for elected office

Explanation:

Political parties in the United States play a key role in selecting candidates and providing complete support for them to win an election. Before the primary caucus begins, political parties pre-select a number of important candidates which they believe can hold sway in the elections and win against the competition.  Once a candidate runs for office, the political party provides monetary support as well as ensuring that the campaign runs smoothly.

definitely a for sure. ill see and update if i get the answer

where are the answers

explanation:

be cause we need them