Under What Conditions Are Female Negotiators More Effective Than Male

Under what conditions are female negotiators more effective than male negotiators?

A) when the female negotiators are attractive and unmarried
B) both negotiators are attractive females and a means of communication is available
C) the other party has children and the female negotiator is a mother
D) when there is at most one female negotiator
E) there are no conditions in which female negotiators are more effective than male negotiators