Think Academy purchased some footballs and basketballs, the ratio of the number of footballs to the number of basketballs is 5:6, and the ratio of the unit prices is 9:10. What is the ratio of their total prices? 
选项为:A:3:1  B:4:3  C:27:25  D:3:4  E:25:27  请回答其中一个选项.