Which of the Following Describes a Surplus-Enhancing Transaction

Which of the following describes a surplus-enhancing transaction?

A) The Federal government taxes wealthy individuals to pay for income support payments to poor people.
B) The public television station cancels Sesame Street because nobody pledged during that show even though many kids were watching it.
C) I pay $5.00 for one scoop of ice cream at the ballgame even though I have a whole gallon at home in my freezer that cost me less than $5.00.
D) Your state government imposes a higher minimum wage law than the one set by federal law.