Use the Following to Answer Question

Multiple Choice

Use the following to answer question:
-(Figure: Demand and Supply of Gasoline) Use Figure: Demand and Supply of Gasoline.What might cause the supply curve to shift from S₂ back to the initial supply curve S₁?

A) The Organization of Petroleum Exporting Countries (OPEC) restricts the production of crude oil.
B) OPEC increases the production of crude oil.
C) U.S.citizens want to buy more gas.
D) Technology in the refinement of gasoline greatly improves.