3 background information about the name choice of New York

Which of the following was a difficulty faced by the ottoman empire in the 1700s and 1800s?   a.  financial independence      b.  lack of trained artisans      c.  refusal to trade with other nations      d.  rebelling ethnic groups

Western sahara is occupied by whom? a. mauritania b.algeria c. morocco d. tunisia

Why are primary sources important when studying historical events