The Price Elasticity of Demand for Gasoline in the Short

Essay

The price elasticity of demand for gasoline in the short run has been estimated to be 0.4.If a war in the Middle East causes the price of oil (from which gasoline is made) to increase, how will that affect total revenue from gasoline in the short run, all other things unchanged?
A.Quantity demanded will stay the same; total revenue will fall.
B.Quantity demanded will decrease; total revenue will rise.
C.Total revenue will remain unchanged.
D.Demand will not change; total revenue will rise.