Question ID:PT4 S1 Q3 Passage:Oil analysts predict that if the price of oil falls by half, the consumer’s purchase price for gasoline made from this oil will also fall by half. Stem:Which one of the following, if true, would cast the most serious doubt on the prediction made by the oil analysts? Correct Answer Choice:EChoice A:Improved automobile technology and new kinds of fuel for cars have enabled some drivers to use less gasoline. Choice B:Gasoline manufacturers will not expand their profit margins. Choice C:There are many different gasoline companies that compete with each other to provide the most attractive price to consumers. Choice D:Studies in several countries show that the amount of gasoline purchased by consumers initially rises after the price of gasoline has fallen. Choice E:Refining costs, distribution costs, and taxes, none of which varies significantly with oil prices, constitute a large portion of the price of gasoline.