The ratio of Marnie\textquotesingle s $\textbackslash$2$-notes to $\textbackslash$5$-notes was $5:2$. She had a total of $\textbackslash$160$. How many notes did she have? 
选项为:A:$$8$$  B:$$40$$  C:$$56$$  D:$$64$$  请回答其中一个选项.