What caused earthquakes, fires and tsunamis?​

A: What do you think of this dress. Julia?
B: It's lovely. It's the nicest of all you've tried on yet.

A: Yes, but I prefer short dresses.  
B: Well, it's true that this dress is longer than the blue one, but it's also more elegant.

A: Yes, but it's the most expensive dress we've seen so far.
B: I know. The blue one is much cheaper, but it doesn't look as good as the black one.

A: Oh! I can't decide. What time is it?  
B: It's only 6 o'clock. We've got plenty of time.

A: Really! I thought it was later than that.
B: Why don't we go to another shop?

A: No, I've decided. I like the black dress better. It's the most expensive, but it doesn't matter.
B: OK. Let's go and pay for it.