单项选择题

W: Have you traveled much
M: Well, I’ve been around the world several times!
W: What countries have you visited then
M: I have been to France, Italy, Japan, and Ireland.
W: Why did you visit them Was this just for vacation or work
M: Have you ever been to Britain on vacation
W: Oh, yes. I’ve often been to Britain.

Questions: How many countries are mentioned in the conversation（）

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