How many discs come with the Sims 2 University expansion pack?

I bought the game when it came out years ago, and recently I felt compelled to start playing again. Ive been installing the packs on my laptop, but I don't know if I have all the discs for University. I know some boxes had the entire game as just one cd, but mine is at least 3. Does anyone know if University only came with 3 CDs or is there a fourth?