The answer is B. Region 3
They were very important workers because they helped the country a lot
At the peak of the Roman Empire's reach, around A.D. 117, the Empire stretched as far north as modern Scotland, stretched down through Europe east into Asia as far as the border between modern day Iraq and Iran, with its southern reaches extending into northern Africa.
Economic decline and panic selling and sparked the great depression
B,c,d because it makes sense