In a citezens take part in day to day governmental affairs

an election

Explanation:

Citizens participate directly in the conduct of public affairs when they are elected to public office. They also do so when they vote to decide public issues through a referendum or other electoral process. Indirect participation takes place when people elect bodies such as parliaments to represent them.

The answer is option B which includes: i. Donations from individuals and interest group PACs and ii. Unregulated by the Federal Election Commission

Soft money refers to money donated to a political party by individuals, Political Action Committees, corporations or any other source, which purpose isn't to promote a specific candidate but to spend it on party-building activities (advocating the passage of a law, voter registration, etc.). This type of political contribution isn't regulated in any way.