In What Way Are the Green Chemistry Production of Biodiesel

In what way are the green chemistry production of biodiesel fuel and of soap different?

A) Biodiesel fuels require the addition of acids, while production of soap uses bases.
B) Biodiesel fuels are converted to methyl esters, while soaps are converted to sodium salts.
C) Biodiesel fuels produce glycerol, while soap production produced methanol.
D) Biodiesel fuel decreases the amount of waste produced, while soap production increases the amount of waste.