Consider the Following Equation: GHG = × ×

Consider the following equation: GHG = × × GDP,
Where GHG = world annual emissions of greenhouse gases
Energy = world annual amount of energy consumed
GDP = world's annual gross domestic product
Suppose GHG emissions decreased by 6% between 2012 and 2014,a period when GDP increased by 4% and Energy/GDP decreased by 2%.We can conclude that over the same period

A) remains unchanged.
B) decreased by 4%.
C) increased by 4%.
D) decreased by 8%.
E) decreased by 6%.