In the class, the teacher gave $4$ numbers:$15, 27, 36, 8$. Billy added another number to make the sum result of these $5$ digits to $100$. Guess what\textquotesingle s the number Billy added ? ( adapted from $$2009$$ Math kangaroo Problems, Level $$1-2$$, Question \#$$5$$) 
选项为:A:$$13$$  B:$$14$$  C:$$15$$  D:$$16$$  E:$$12$$  请回答其中一个选项.