GDP Per Capita (in U.S. dollars)
Country GDP per Capita
United Arab Emirates $29,100
Kuwait $22,800
Iran $8,100
Jordan $4,800
Sudan $2,100

Why might there be such a drastic difference in the per capita GDP of these selected countries of Southwest Asia (the Middle East)?
A) foreign invasion B) lack of urban areas C) access to waterways D) access to oil fields