Rina bought a handbag for＄$$60$$ at a discount of $$20\textbackslash\%$$. Ana paid＄$$67.5$$ for the same handbag. What was the discount rate given to Ana? 
选项为:A:$$10\textbackslash\%$$  B:$$12\textbackslash\%$$  C:$$15\textbackslash\%$$  D:$$18\textbackslash\%$$  请回答其中一个选项.