How do developed nations continue to control developing nations?

Ineed on 2-4 i want y’all to reply to this question so i can turn this into my teacher tomorrow

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

What’s the answer this this question