A solicitor is preparing for an interview with a new client who wants a divorce to discuss private retainer options. The case is likely to be straightforward. The solicitor is considering whether it would be preferable for him to charge a fixed fee or an hourly rate in this case.Which of the following correctly sets out whether the solicitor should charge an hourly rate or fixed fee?
选项：

A:An hourly rate, because the final costs of the work needed may be more than the fixed fee. incorrect
B:An hourly rate, because on a fixed fee the client may be more demanding than would otherwise be the case. incorrect
C:An hourly rate, because the client may not be able to recover the full fixed fee from the other party. incorrect
D:A fixed fee, because this will be more attractive to the client and provide certainty for the client and solicitor. correct
E:A fixed fee, because this will avoid any costs disputes with the client once the case is finished. incorrect