What may scientists determine through the study of ancient bones or teeth? Select all that apply. A. when the person or animal lived
B. why the person or animal migrated
C. what age the person or animal was at death
D. what the person or animal thought
O E. where the person or animal was born

any answer

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.

the congress realized that action had to be.