The average price for regular gasoline at U. S. pumps fell almost 4 cents in March to $2.50 a gallon. The price of crude oil dropped to $43.46 per barrel on March 17, the lowest since March 2009.

C. lower the cost of producing gasoline and increase the supply of gasoline

Explanation:

Gasoline is derived from the distillation of crude oil which means that Crude oil is the main raw material in the production of gasoline. This means that if crude oil sees a reduction in price, input costs for gasoline will decrease as well.

Producers of gasoline will take advantage of this to buy more crude oil and therefore process and make more gasoline which will increase the supply of gasoline in the market and reduce its price.