Question

Many Middle Eastern countries depend on oil as their main source of income. This is a problem because __________.

A. oil production does not provide much money, and the region is poor

B. oil is a nonrenewable resource that may run out in the future

C. the region is rich in farmland and should be focusing on agriculture

D. there is not a demand for oil, and no countries want to purchase it

Answer 1

The answer is B.
It can't be A because oil provides a large amount of money and the Middle East is rich in it. 
It can't be C because the Middle East does not have fertile land (it's in a desert mostly).
And it can't be D because oil is the highest thing in demand currently. It's what runs our cars and much more. 
Oil is however, nonrenewable. So once it's used up, it's just gone. So your answer is B. 

Answer 2

the answer to your question is B