Consider the Following Equation $\mathrm{GHG}=\frac{\text { GHG}}{\text {Energy }}\times \frac{\text {Energy }}{\text {GDP }} \times GDP,$

Consider the following equation: $\mathrm{GHG}=\frac{\text { GHG}}{\text {Energy }}\times \frac{\text {Energy }}{\text {GDP }} \times GDP,$
Where GHG = world annual emissions of greenhouse gases Energy = world annual amount of energy consumed GDP = world's annual gross domestic product
The ratio Energy/GDP describes

A) the amount of energy per unit of GDP required to stabilize greenhouse gas emissions.
B) the energy efficiency of greenhouse gas emissions.
C) the number of units of carbon- based energy produced as a fraction of GDP.
D) the number of units of energy used per dollar of GDP produced.
E) the amount of energy used per unit of output in the energy- intensive sector of the economy.