$$4$$ years ago, Fang Fang and Jia Jia\textquotesingle s ages were $$20$$. This year Fang Fang is $$15$$ years old. How many years later will Jia Jia be $$15$$ years old too?  $$4$$年前，方方和佳佳的年龄和是$$20$$岁．今年方方$$15$$岁，再过~\uline{~~~~~~~~~~}~年佳佳也是$$15$$岁． 
选项为:A:$$0$$  B:$$1$$  C:$$2$$  D:$$3$$  E:$$4$$  请回答其中一个选项.