A、Arguing. B、Protesting. C、Complaining. D、Bargaining. C根据对话中提到的You know I had so much．．．just kept ringing和get…too，even…可知，他们在抱怨，

W: You Americans are funny. It seems as if you were married with cars.
M: Yeah, I guess that’s true. The country is becoming one big highway. I was reading that there are about 4 million miles of roads and highways in this country now.
Q: What are they talking about?

M: Oh, what a morning! You know I had so much work to do and the phone just kept ringing. Three sales people called me this morning.
W: I know how it is. I get a lot of calls, too, even on weekends.
Q: What are the two speakers doing?