Explain how city planners solved space and transportation problems in the late 1800s with new inventions.

City planners made possible Mass transit, as cities grew, planners began to use zoning to designate certain parts of the city for certain functions. - Cities set aside space for heavy industry, financial institutions, homes, and public spaces such as libraries and government buildings.

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