The Market Price of a Gallon of Gasoline Is a

The market price of a gallon of gasoline is a

A) macroeconomic topic,because the market in gasoline is nationwide.
B) microeconomic topic,because it involves the price of a single good.
C) macroeconomic topic because of the large volume of gasoline bought and sold each day.
D) microeconomic topic,because the price of a gallon of gasoline is less than $10.
E) macroeconomic topic,because the price of gasoline has implications for the whole economy.