An Energy Exporting Country Stands to Gain

An energy exporting country stands to gain

A) under a cap and trade system if the supply of crude is kept below the level achieved with a price on emissions.
B) under a cap and trade system if the supply of crude is kept over the level achieved with a price on emissions.
C) under a carbon tax system if the supply of crude is kept below the level achieved with a price on emissions.
D) under a carbon tax system if the supply of crude is kept over the level achieved with a price on emissions.