The sum of the smallest three-digit numbers whose digits add up to $$8$$ and the largest three-digit numbers whose digits add up to $$8$$ is equal to~\uline{~~~~~~~~~~}~. ($$2011$$ Math kangaroo Problems, Level $$7-8$$, Question \#$$10$$) 
选项为:A:$$707$$  B:$$907$$  C:$$916$$  D:$$1000$$  E:$$1001$$  请回答其中一个选项.