Which of the Following Would Not Shift the Demand Curve

Which of the following would not shift the demand curve for union labor to the right?

A) an increase in the demand for union-made goods
B) an increase in labor productivity by lowering quit rates
C) an increase in the supply of products that compete with union-made products
D) an increase in labor productivity through better labor-management relations
E) an appeal to consumers to buy only union-made products