The amount of money that Rachel saved was $$\textbackslash$1670$$ when rounded off to the nearest $$\textbackslash$10$$. What was the greatest amount of money she could have possibly saved (from the below options)? 
选项为:A:$$\textbackslash$1664$$  B:$$\textbackslash$1669$$  C:$$\textbackslash$1674$$  D:$$\textbackslash$1675$$  请回答其中一个选项.