What is the main idea of the Pericles and the Golden Age of Athens article?

He so dominated the life of Athens from 461 to 429 B.C. that this period often is called the Age of Pericles. He had three goals/his plan (1) to strengthen Athenian democracy, (2) to hold and strengthen the empire, and (3) to glorify Athens.

Explanation:

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

the monroe doctrine is the best known u.s. policy toward the western hemisphere. buried in a routine annual message delivered to congress by president james monroe in december 1823, the doctrine warns european nations that the united states would not tolerate further colonization or puppet monarchs.