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 middle-management job, and his wife, who is a stay-at-home mother
C) A couple, both of whom have high school educations; he is a primary school teacher and she is a waitress
D) A husband who has a college degree and is a high school teacher and his wife, who has an MBA and works as an insurance company executive
E) A couple, both of whom have college degrees and are high school teachers