Suppose you are negotiating with Americans. Which of the following behaviors should you avoid if you don't want the American negotiators to lose patience？
选项：

A:Hold a firm position and argue with them directly.
B: Have lengthy small talk and try to build a strong relationship with them.
C: Say you have to ask your boss's opinion before giving them an answer.
D: Talk about details and try to sign a contract when the lawyer is absent.