Was the emperor of china who hosted the polo family.

The right answer is the powerful Emperor Kublai Khan (1215-1294).

Explanation: Just to elaborate a little on the answer, it can also be added that serving at the court of Emperor Kublai Khan granted the Italian merchant Marco Polo (1254-1324) the opportunity to write some of the earliest accounts on China known at that time by the Europeans. Marco Polo and his relatives spent several years in China, and Kublai Khan thought very highly of them. They made a small fortune at the service of this ruler, but eventually returned to Venice.

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.