Vera leaves home at $$9.15$$ a.m. to walk to Derek's house, which takes her $$25$$ minutes. Carl leaves his house $$5$$ minutes after Vera but only takes $$6$$ minutes to get to Derek's house.  When Carl arrives, how long will he and Derek have to wait for Vera to arrive? 
选项为:A:$$11$$ min  B:$$14$$ min  C:$$21$$ min  D:$$24$$ min  请回答其中一个选项.