Which of the following is not a fringe benefit? Select one: a. A large retailer gives a 20% staff discount to its staff of 500 employees on all its goods. b. A shareholder, who is also an employee, receives shares in lieu of a dividend. c. An employer provides all its staff with free gym membership at a cost of $1,500 per year. d. A past employee was lent money by the company at a discounted rate and is still paying it off