In 1883, who was responsible for creating the first
system of time zones in the United States?

The railroad industry

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

in the 1950s, country music came into its own before rock-n-roll took off in the 60s while jazz and classical music continued to innovate