Are all sentences below correct in terms of punctuation? Which is the most preferred, and which is the least preferred in your opinion?<br/><br/>(1) The question is 'How do we avoid it?'<br/><br/>(2) The question is, how do we avoid it?<br/><br/>(3) The question is: How do we avoid it?<br/><br/>Thanks,<br/><br/>Goronsky