What is the size of a rectangle if the original $$15 cm$$ length is reduced by $40\textbackslash\%$~and the $$12 cm$$ width is reduced by $50\textbackslash\%$? 
选项为:A:$$6cm\times 3cm$$  B:$$7cm\times 3cm$$  C:$$4cm\times 3cm$$  D:$$9cm\times 6cm$$  E:$$9cm\times 7cm$$  请回答其中一个选项.