This region in South America has faced all of the following challenges recently except:

A: Harsh rule by military rulers

B: Difficulty controlling and developing natural resources

C: Recent colonization by European nations

D: Extreme gaps between rich and poor

I would say C

Explanation:

I don't know what region you are talking about, but I do believe that European nations have not taken over any region recently.

Unless you mean relative to your time period which would probably be A since they have been mining diamonds since 1700s.

in all honesty, it really hasn't. except that hitler killed himself.