Read the following article and answer the question.

I had a dentist appointment earlier this week . Anyone who knows me knows that there are few things I hate more than going to the dentist . Growing up , I went to a great dentist , and in general , my teeth are in pretty good shape , but I ' ve had a few fillings done , and I ca n't imagine that anyone enjoys that . When I moved to D.C. and signed up for insurance , I opted to not add on the additional dental insurance , but when I got my new insurance info for 2008 , it appeared that my insurance company had opted to add on some dental benefits .

What is true of the narrator 's insurance ?
They company added extra 's they did n't sign up for .