How did flooding rivers contribute to the beginning of farming communities?
a. they irrigated the crops when they overflowed.
b. they created a marshy environment good for planting.
c. they provided water and stayed within their banks.
d. they left rich soil when floodwaters receded.

answer: in 1900, there were no "workplace safety laws"!

explanation: at the beginning of this century, workers in the united states faced remarkably high health and safety risks on the job.

a century ago in 1900 about three hundred out of every one hundred thousand miners were killed on the job each year.

[industria] developments occurred within a legal and regulatory climate that diminished employer’s interest in safety. as a result, americans developed production methods that were both highly productive and often very dangerous.