John, a 36-year-old college graduate, had managed ABC Hardware for 12 years (during which time it had grown to 30 employees). During this time, the store always made a profit and John always received good job evaluations. As such, John was surprised to learn that he was being replaced by Mary, a 24-year-old recent college graduate with no management experience. The store's owner truthfully told John that he hired Mary because he wanted "some young blood." Soon after Mary took over, the stores sales began to decline. Accepting all of these facts as true, which statement is accurate?

A. John has a strong case against ABC for age discrimination under the ADEA B. John has a strong case against ABC for gender discrimination under the ADEA C. Both A and B are correct D. None of the above is correct