(A) resources are scarce
(B) countries default
(C) global warming is important
(D) why some countries are rich and others poor
The answer is: (D) why some countries are rich and others poor
(A) resources are scarce
(B) countries default
(C) global warming is important
(D) why some countries are rich and others poor
The answer is: (D) why some countries are rich and others poor