Consider these two operations:~$a\textbackslash{} ◊\textbackslash{} b=a^{2}-b^{2},\textbackslash{} a\textbackslash{} \bigstar\textbackslash{} b=(a-b)^{2}$  What is the value of~$(5\textbackslash{} ◊\textbackslash{} 3)\textbackslash{} \bigstar\textbackslash{} 6$? 
选项为:A:$$-20$$  B:$$4$$  C:$$16$$  D:$$100$$  E:$$220$$  请回答其中一个选项.