Which of the Following Represents an Agency Coupled with an Interest

Which of the following represents an agency coupled with an interest?

A) A contingent fee arrangement in which a plaintiff's attorney will receive 20% of any recovery she achieves.
B) A professional sports contract in which a team owner agrees to pay a player insurance premiums on a policy that compensates the player should he suffer a career-ending injury.
C) A loan agreement in which the borrower pledges collateral to the lender and gives the lender the power to take the collateral should the borrower default on the loan.
D) A contract in which a sales agent is hired for three years at a salary of $80,000 plus 5% of sales.