9. what was the most important reason water
served as a major concern for inhabitants of the
region west of the mississippi river?
a. easiest travel took place by using rivers.
b. most of the region was desert.
c. communities would die without access to
clean water.
d. water access made certain lands very
valuable.

D. Water access made certain lands very

valuable

Explanation:

the dust bowl, otherwise known as the dirty thirties, was a huge dust storm that killed multiple (and i mean  multiple) farmer's crops, leaving them homeless, and foodless, and jobless. in california, there were 5.7 million residents, and the population shrank as mexicans were repatriated. however, when the dustbowl happened, a lot of people began to move to california. by 1940, 250,000 people had arrived. therefore, your answer would be  the population increased, massively.  i hope this !

explanation:

a and b!

dfroos means which is a and b