In Your Textbook There Is an Exhibit That Shows (For

In your textbook there is an exhibit that shows (for selected industries) the median weekly earnings of workers represented by labor unions and the median weekly earnings of workers not represented by labor unions. The point to be made by this comparison is that in some cases,

A) nonunion workers earn more than union workers (which is different from what most people expect) .
B) nonunion workers and union workers earn the same.
C) union workers earn always more than nonunion workers.
D) the number of union workers is greater than the number of nonunion workers.