Suppose the California Nurses Union successfully secured a 12 percent increase in the wages of registered nurses

If a hospital responds by reducing the quantity of registered nurses hired and increasing the quantity of physician's assistants hired, what conclusion can you draw?
A) The price elasticity of demand for registered nurses is negative while the price elasticity of demand for physician's assistants is positive.
B) The cross-price elasticity of demand between registered nurses and physician's assistants is negative.
C) Physician's assistants are more valuable in terms of their productivity.
D) The cross-price elasticity of demand between registered nurses and physician's assistants is positive.

D