Which of the Following Is an Example of Employment Discrimination

Which of the following is an example of employment discrimination?

A) John and Carrie work in the same office and have the same job responsibility.John is paid ten cents more an hour because he has a family.
B) Louis and Arnie work on the same production line.Both receive the same base rate but Louis also receives an additional per hour stipend.
C) Nattie and Jacob apply for the same open position.Both have similar educational and prior work experiences.Jacob is hired over Nattie because administration felt the position was better suited for a man.
D) Grace, who is married, earns less than Gabby who is not married.