A Male Driver for a Company Is Paid $1 Per

A male driver for a company is paid $1 per hour less then a female driver.Which of the following is least likely to be a valid reason under the Equal Pay Act?

A) The female driver has worked longer for the company.
B) The female driver has a better safety record than the male driver does.
C) The female driver drives a larger truck that is more difficult to operate.
D) Generally, females are known to be safer drivers.
E) The female driver has completed more training classes than has the male driver.