When $$4$$ kilograms of $$30\textbackslash\%$$ sugar water is mixed with some $$10\textbackslash\%$$ sugar water, it gives a mixture with a sugar concentration of $$26\textbackslash\%$$. How much $$10\textbackslash\%$$ sugar water is needed?~\uline{~~~~~~~~~~}~$$\text{kg}$$ 
选项为:A:$$1$$  B:$$2$$  C:$$3$$  D:$$4$$  E:$$5$$  请回答其中一个选项.