US citizen wondering if I qualify for duel citizenship

[shadowguy]

Hello all, I've recently become curious about something - whether I qualify for duel citizenship.  My situation:  I am a US citizen by birth (born 1984) to a mother born here and a father born in Canada (in 1947).  However, my father moved here with his parents as a child, and when they became US citizens, he did as well.  I looked at the citizenship pages and couldn't really see if I qualified for duel citizenship, or Canadian citizenship period.  Anybody know?  Thank you.