Paul wanted to buy $9$ basketballs. The basketballs were sold either for $3.2$ dollars each or at $9$ dollars for a bag of $3$ basketballs. How much money would Paul save if he buys three bags of basketballs instead of buying $9$ basketballs separately? 
选项为:A:$1.2$ dollars  B:$1$ dollar  C:$0.9$ dollars  D:$0.8$ dollars  E:$0.6$ dollars  请回答其中一个选项.