A More Efficient Process for Refining Oil into Gasoline Is

A more efficient process for refining oil into gasoline is developed.As a result, the market price of gasoline:

A) and the quantity of gasoline purchased both increase.
B) increases and the quantity of gasoline purchased falls.
C) decreases and the quantity of gasoline purchased rises.
D) decreases and the demand curve for gasoline shifts to the right.
E) and the quantity of gasoline purchased both decrease.