求助CR一题！"Headhunters" are firms that...

提出这个问题不是因为不会做，是觉得像这样的问题，不像大多数的GMAT逻辑题都是浮在表面非常直观，有时候甚至不用动脑子直接找套路，但像下面这样的题似乎需要一点点地深入，不知是我个人感觉，还是普遍现象：

"Headhunters" are firms that, for a fee, undertake to recruit for their clients personnel who are greatly needed yet hard to find. The clients, in turn, require that they be offlimits to headhunters whose services they buy; i.e. headhunters cannot raid one client's staff on behalf of other clients.

Of the following, which would, if feasible, be the best strategy for a company to pursue if that company wanted both to use headhunters to fill a vacancy and , if successful in filling the vacancy, to reduce the risk of losing the newly hired employee to a competitor?

A  Find out which headhunters recruit workers of the sort being sought and emply all those headhunters.

B  Find out which headhunter has the highest success rate in recruiting for its clients and hire that firm.

C  Find out how much the company's competitors currently pay staff of the sort being sought and offer to pay prospective employees higher salaries.

D  Find out whether any of the company's competitors are seeking to recruit workers of the sort being sought and , if so , make sure not to hire the same headhunters that they hire.

E  Find out which of the company's competitors are on the client lists of the headhunters who are being considered for the job.