The average height of all the teachers in Grape School is $168$. There are $5$ male teachers in Grape School with an average height of $180$. The average height of female teachers is $162$. How many female teachers are there? 
选项为:A:$$5$$  B:$$9$$  C:$$10$$  D:$$18$$  E:$$21$$  请回答其中一个选项.