24) what purpose do 3rd parties play in presidential elections?

Third parties may also help voter turnout by bringing more people to the polls. Third party candidates at the top of the ticket can help to draw attention to other party candidates down the ballot, helping them to win local or state office.

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.

the gutenberg bible was and about 180 copies were sold/made