Water makes up $$84\textbackslash\%$$ of the weight of Kubus the Camel when he is thirsty. After he drinks, Kubus weighs $$800$$ kg and water makes up $$85\textbackslash\%$$ of his weight. What is the weight of Kubus the Camel when he is thirsty? ($$2001$$ Math Kangaroo Problem, Level $$9-10$$, Question \#$$16$$) 
选项为:A:$$672$$ kg  B:$$680$$ kg  C:$$715$$ kg  D:$$720$$ kg  E:$$750$$ kg  请回答其中一个选项.