Referring to the previous question, all else constant, a 5 unit increa

Referring to the previous question, all else constant, a 5 unit increase in the wage index would cause:

A) quantity supplied to increase by 9 units and be shown by a movement up the supply curve.
B) quantity supplied to decrease by 9 units and be shown by a movement down the supply curve.
C) quantity supplied to increase by 9 units and be shown by a rightward shift of the supply curve.
D) quantity supplied to decrease by 9 units and be shown by a leftward shift of the supply curve.

ANSWER

D