Consider the following daily production data for MadeFromScratch, Inc. MadeFromScratch sells cupcakes for $3 each and pays the workers a wage of $325 per day.

Labor (Number of workers)	Output (Cupcakes per day)	Marginal Product of Labor (Cupcakes per day)	Value of the Marginal Product of Labor (Cupcakes)	Wage (Dollars per worker per day)	Marginal Profit (Dollars)
0	0			325
1	200			325
2	350			325
3	475			325
4	575			325

Refer to Table 18-6. Suppose that there is a technological advance that allows MadeFromScratch employees to produce more cupcakes than they could before. Because of this change, the firm's

a. supply of labor shifts right.

b. supply of labor shifts left.

c. demand for labor shifts right.

d. demand for labor shifts left.