What do parties do to select the party's presidential candidate? which members of the party are involved? when do they take these actions?

Primaries are held in each State

explanation:

with the profits from the european sales, merchants purchased europe's manufactured  goods, including tools and weapons. then the merchants shipped those manufactured  goods, along with the  american  sugar and rum, to west africa where they were bartered for  slaves.

its a hope it good luck