3. what occurs at a national convention?

Select the party's nominee for president

Explanation:

During this convention the party's vote on their candidate for president and vice president while also discussing ideas and goals.

the answer to your question is a. the salt plains

in 1811, he led an expedition, known as the george c. sibley expedition, to improve relations with the pawnee and kansa tribes, and also to locate the rumored jefferson's salt mountain

music and prayer? (you may punch me in the face if im wrong : > )