The monroe doctrine of 1823 warned europe to stay out of the americas, and the u. s. would stay out of european affairs. why was this foreign policy effective, and why did europe accept it?
a constant fighting had weakened the european countries.
b it benefited great britain, and the british navy enforce it.
c france and italy were afraid of american expansion into europe.
d european countries had already divided up all of the new world.

It's 'It benefited Great Britain, and the British navy helped enforce it.'

nations must cooperate to bring about and maintain world peace.

nations must not wage wars or commit war crimes in a desire to control other nations.

i think i know which options you have but if these aren't options let me know

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.