During Easter, tickets are $$$4$$ for a single person and $$$12$$ for a family ($$2$$ adults and $$2$$ children). What is the difference in price between $$4$$ single tickets and a family ticket? 
选项为:A:$$$13$$  B:$$$2$$  C:$$$4$$  D:$$$7$$  E:$$$12$$  请回答其中一个选项.