Ellie and Gloria have to interview a total of $$400$$ people. Ellie can interview $$60$$ people every week. If Gloria and Ellie work together, they can finish all the work in $$4$$ weeks. How many weeks will it take to finish interviewing everyone by Gloria herself? 
选项为:A:$$8$$  B:$$10$$  C:$$12$$  D:$$14$$  E:$$16$$  请回答其中一个选项.