The bar graph in the following graphic represents fictional net exports in billions of dollars for five countries. Net exports are obtained by subtracting total imports from total exports; a negative net export means the country imported more goods than it exported. Net Exports (Billions of dollars) United States Denmark China Germany Spain -150 -100 150 -50 050 100 Net Exports (Billions of dollars)

What is the difference between the net exports from The United States and Denmark?

a. 70 billion dollars
b. 80 billion dollars
c. 90 billion dollars
d. -140 billion dollars