An attorney agreed to represent a plaintiff in a personal injury lawsuit, and the client agreed to pay the attorney a contingent fee based on a percentage of the award in the case. The attorney put all the terms of the fee agreement in written form in a letter to the client. The letter explained the percentage that should accrue to the attorney the event of settlement, trial, or appeal; litigation and other expenses that the attorney would deduct from the recovery; and that such deductions would come out of the total before the calculation of the contingent fee. The letter also explained all potential expenses for which the client could be liable, if the client prevailed in the case or not. The client received the letter, read it carefully, and called the attorney to give verbal assent and confirmation to all the terms. The client's spouse later discarded the letter, and the attorney proceeded with the representation. Could the attorney be subject to discipline, based on these facts? a. Yes, because the client did not sign the fee agreement. b. Yes, because the attorney arranged to deduct expenses from the total award before the calculation of the contingent fee, rather than after the determination of the fee. c. No, because the letter constituted a written fee agreement stipulating all the terms of the contingent fee arrangement, and the client gave full consent and authorization over the phone. d. No, under the Model Rules, a written fee agreement signed by the client is pr