一个小问题请大牛帮忙

wuqian321

The fewer restrictions there are on the advertising of legal services, the more lawyers there are who advertise their services, and the lawyers who advertise a specific service usually charge less for that service than the lawyers who do not advertise. Therefore, if the state removes any of its current restrictions, such as the one against advertisements that do not specify fee arrangements, overall consumer legal costs will be lower than if the state retains its current restrictions.

Which of the following, if true, would most seriously weaken the argument concerning overall consumer legal costs?

(A)          The state has recently removed some other restrictions that had limited the advertising of legal services.
(B)          The state is unlikely to remove all the restrictions that apply solely to the advertising of legal services.
(C)          Lawyers who do not advertise generally provide legal services of the same quality as those provided by lawyers who do advertise.
(D)          Most lawyers who now specify fee arrangements in their advertisements would continue to do so even if the specification were not required
  E            Most lawyers who advertise specific services do not lower their fees for those services when they begin to advertise

请问一下D是无关选项，如何看出来的？