The Total Surplus in a Market Is The

The total surplus in a market is the:

A) excess supply due to a price above the equilibrium price.
B) surplus that accrues when a good is not scarce,defined as the total amount (if any) by which the quantity supplied exceeds the quantity demanded at a zero price.
C) net benefit to consumers,defined as the excess of consumer surplus over producer surplus.
D) sum of consumer surplus and producer surplus.