Assume the Following Conditions Hold: (1) the Demand for Every

Assume the following conditions hold: (1) the demand for every type of labor is the same, (2) there are no special nonpecuniary aspects to any job, (3) all labor is ultimately homogeneous and can costlessly be trained for different types of employment, (4) all labor is mobile at zero cost. Given these conditions,

A) wage rates will be the same in most labor markets.
B) the demand for labor will be less in some labor markets than in others.
C) wage rates will be the same in all labor markets.
D) wage rates will be the same in very few labor markets.