Q: What are they talking about?

A: Something about being an aunt.

B: Something about the baby.

C: Something about being a uncle.

D: Something about being a father.

解析： B
整段对话其实是在说baby 的性别是什么，而作为父亲的Ross 不想知道。但是Monica 知道了，后来他告诉了Joey 。 

====原文====

Rachel: (to Ross) I can't believe you don't want to know. I mean, I couldn't not know, I mean, if, if the doctor knows, and Carol knows, and Susan knows....

Monica: And Monica knows...

Ross: Wha, heh, how could you know, I don't even know!

Monica: Carol called me to thank me for the lasagna, I asked, she told me.

Joey: So what's it gonna be? (Monica whispers in Joey's ear. Ross gets up and waves arms frantically in protest)

Ross: Wait—oh—hey—huh, oh great now he knows, and I don't know!

Monica: I'm sorry, I'm just excited about being an aunt!

Joey: Or an uncle...  

来源：