Which of the following statements is false? Select one: a. A lawyer may enter into a contingency fee agreement with her client. Such an agreement sets out the portion of any amount collected on behalf of the client that the lawyer is entitled to retain. b. Lawyers usually bill their clients on the basis of their hourly rate and the amount of time they spend working on a particular file. c. A "retainer" is an amount paid by a client to a lawyer to ensure that the lawyer will represent the client. not the other party involved in the dispute. The retainer must be paid in addition to the fees normally charged by the lawyer. d. Disbursements are expenditures made by a lawyer on behalf of his client. The lawyer is entitled to a credit for disbursements he has paid, when he bills his client