Because of the High Cost of Fuel, Railroads Such as Union

Because of the high cost of fuel, railroads such as Union Pacific Corp and CSX Corp have increased the price they charge to haul freight. This change means that

A) the supply curve for hauling freight has shifted rightward.
B) the supply curve for hauling freight has shifted leftward.
C) the demand curve for hauling freight has shifted rightward.
D) the demand curve for hauling freight has shifted leftward.
E) neither the supply curve nor the demand curve for hauling freight has shifted; the only change is that the price is higher.