Adam paid ＄$$6$$ for $$15$$ buns. How many dollars did Tom pay for the same kind of buns if he bought $$5$$ more of them? (2008 Math Kangaroo Problem, Level 1-2, Question \#13) 
选项为:A:$$7$$  B:$$8$$  C:$$9$$  D:$$10$$  请回答其中一个选项.