Third-party candidates have difficulty winning elections in the united states because nearly all elected officials are selected by
question 12 options:
at-large districts.
caucuses.
proportional representation.
single-member districts.

The correct answer is D) Single-member districts

Explanation:

Modern United States politics is dominated by two major parties, The Republicans (also known as the GOP) and the Democrats.

There are numerous independent candidates but in modern history, the president of the country has been selected from either one these parties.

This is not to say that other parties have not tried to develop a following. The most famous example in the 2016 elections was that of the Libertarian party. While it got some press, the party failed to make a national mark.

i think the answer is a and i hope this ; ))