First Grade Teachers Who Work in Lynn,Massachusetts (A Large,low Income

First grade teachers who work in Lynn,Massachusetts (a large,low income city north of Boston) public schools earn more than first grade teachers who work in private schools in more affluent communities north of Boston.Lynn teachers belong to a teachers' union.Which statement best explains the scenario described above?

A) Lynn school teachers receive a compensating differential because they work in a more difficult environment,and they receive higher than market equilibrium wages because they are members of a teachers' union.
B) Lynn school teachers receive a compensating differential because they work in a more difficult environment,but they do not receive higher than market equilibrium wages because they are members of a teachers' union.
C) Lynn school teachers do not receive a compensating differential because they work in a more difficult environment,but they do receive higher than market equilibrium wages because they are members of a teachers' union.
D) Lynn school teachers do not receive a compensating differential because they work in a more difficult environment,and they do not receive higher than market equilibrium wages because they are members of a teachers' union.