Of the Following, Who Would Probably Have the Highest Income

Of the following, who would probably have the highest income?

A) a couple, both of whom have high school educations and work at WalMart
B) a husband who has a high school degree and a middle­management job and his wife, who is a full­time
Mother
C) a couple, both of whom have high school educations; he is a high school teacher and she is a
Librarian
D) a husband who has a college degree and is a high school teacher and his wife, who has an MBA and works
As a insurance company executive
E) a couple, both of whom have college degrees and are high school teachers