Which sentences is TRUE?________
选项：

A:Respondent who expected to be in a short-term relationship were more likely to see the ethically marginal tactics as appropriate than those expecting a long-term relationship.
B:A balance of power should lead to less stable, less ethical conduct than an imbalance.
C:Eastern Europeans are significantly more likely to use bluffing in negotiations than Americans.
D:The use of silence by a negotiator creates a “verbal vacuum” that makes the other comfortable and helps determine whether the other party is acting deceptively.