Why did “instant cities” arise in the West in the late nineteenth cent

Why did “instant cities” arise in the West in the late nineteenth century?

a. City builders rushed to the West to take advantage of the cheap land.
b. People rushed to the West for economic opportunities, and cities sprang up quickly.
c. Easterners were anxious to replicate the cities they had left and built quickly.
d. Building materials were so cheap that it made sense to build an entire city instantly instead of letting it develop over time.
e. White settlers took over western settlements that had already been built by Native Americans.

ANSWER
B