Suppose an Car Engine Could Be Made to Burn at a Higher

Suppose an car engine could be made to burn at a higher temperature, without harming or altering any other part of the engine's operation. At the higher temperature, the engine would

A) have the same efficiency but be able to operate at a higher power.
B) still consume the same amount of gasoline per kilometer traveled.
C) have a lower efficiency.
D) have a higher efficiency.
E) consume more gasoline per kilometer traveled.