What were some
things that were
considered to be the
end of the Middle
Ages

There were many reasons for the downfall of the Middle Ages, but the most crucial ones were the decline of the feudal system, and the declination of the Church's power over the nation-states.

Explanation:

the answer is typhoon

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.