Of the following, ________ represent proper ranking of the U.S. total primary energy consumed from the greatest to least used.
a.fossil fuels, bioenergy, hydroelectric, new renewables, nuclear
b.bioenergy, fossil fuels, nuclear, hydroelectric, new renewables
c.fossil fuels, bioenergy, hydroelectric, nuclear, new renewables
d.fossil fuels, nuclear, bioenergy, hydroelectric, new renewables
e.fossil fuels, bioenergy, nuclear, hydroelectric, new renewables