All but One of These is an Advantage of Biofuels

Question

All but one of these is an advantage of biofuels from food crops. Choose the EXCEPTION.
A)reduced carbon emissions from biofuels
B)biofuels are a renewable resource
C)car manufacturers are producing cars that can use biofuels efficiently
D)biofuels are cheaper to produce

Accepted Answer

Biofuels from food crops are not necessarily cheaper to produce due to the costs associated with growing, harvesting, and processing the crops.