Which of the following is NOT a factor that allowed for the development of the four river-valley civilizations of Mesopotamia, Egypt, the Indus Valley, and China? 1. a government run by a king

2. the division of labor

3. a location next to rivers

4. a surplus of food

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explanation:

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geography

this is because warmer climates often don't get people sick from the flu and regions where it was often colder more people received the flu. hope this if you need more reasoning i am here to

this statement is   true

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.