Ming bought $$3$$ identical files and $$3$$ identical notebooks from a bookshop.  The $$3$$ identical notebooks cost as much as $$1$$ file. She paid ＄$$24$$ altogether.  How much did each file cost? 
选项为:A:＄$$4$$  B:＄$$2$$  C:＄$$6$$  D:＄$$8$$  请回答其中一个选项.