A、Negative. B、Critical. C、Neutral. D、Positive. D对话中他使用了肯定词more united，stronger，and probably wealthier及Life is made so much easie

W: I think it’s really amazing that twelve European countries have abandoned their old currencies and are now using the euro as their common currency.
M: Yes. It’s the most ambitious currency changeover in history.
W: The twelve countries have bound themselves together. Whatever happens to the euro affects them all.
M: Obviously they will be more united, stronger, and probably wealthier, as the designers of the euro hoped.
W: It is also a good thing for the general public. It is very convenient for those who travel a lot either for business or for pleasure.
M: That’s true. No need to waste time and energy changing money. No need to figure out how much you gain or lose in the transactions. Life is made so much easier.
W: So it seems the single currency is a good thing for both the governments involved and for their people as well I don’t understand why Britain is not one of them.
M: The euro is still a very young currency whereas the pound has already had a history of hundreds of years and has become a prestigious and reliable currency in international trading. The British are unwilling to give up the pound and tend to see the adoption of the euro as endangering Britain’s sovereignty.
W: But if the cure gets stronger, will Britain adopt the new currency sooner or later?
M: According to Prime Minister Tony Blair, Britain will adopt the euro only when the economic conditions are right. I think this is a wise decision.