Commas and quote marks

In American English, it's the middle one. But I seem to remember that British English has different rules for this situation.

Yep, the middle one is AmE. I think that's the way British English would put this particular sentence also. The rules go something like this:

American: put all the punctuation inside the quotation marks whether it belongs to the quotation or to the full sentence. Examples: Mary said, "We went to the circus." It was a "media circus."

British: put the punctuation inside if it belongs to the quote, outside if it belongs to the sentence: Mary said, "We went to the circus." It was a "media circus".

There are other exceptions, but that's the way I understand it.

Thanks so much. That's the way I was taught but I wanted to double-check - and this is always the best place to do so.

I'd plump for the last one.