Which of these contributed to the crash of 1929 and the great depression?
a) stock market speculation
b) the effects of world war ii
eliminate
c) success of the u. s. farm economy
d) foreign boycotts of u. s. products

in 550 b.c.e. cyrus the great, the leader of the persians, conquered the medes and united the iranian people under one ruler for the first time. cyrus became the first king of the persian empire and went on to establish one of the largest empires in world.

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