"A. Most Russians of all classes <span>were Orthodox Christians, not Catholics or Protestants" is the best option, since Russia was very much "shut off" from the world and did not experience other religious entities very often.</span>
The Columbian Exchange greatly affected almost every society on earth, bringing destructive diseases that depopulated many cultures, and also circulating a wide variety of new crops and livestock that, in the long term, increased rather than diminished the world human population:)
Poverty, racism, sexism, inadequate and unequal education practices among different social classes, racial barriers, and unfair hiring practices, and lack of education are some social issues that are a result of high unemployment.
Hope this helps! :-)
For the second question the one that is incorrect is Choctaw