As Long as the Supply Curve for a Good Is

As long as the supply curve for a good is upward sloping and the demand curve is downward sloping, a sales tax imposed on sellers shifts the supply curve

A) leftward and definitely raises the equilibrium price.
B) leftward and possibly raises the equilibrium price.
C) rightward and possibly increases the equilibrium quantity.
D) rightward and definitely decreases the equilibrium quantity.