A sequence of numbers is generated by subtracting the same amount each time.  If the $4^{\rm th}$ term is $5$ and the $11^{\rm th}$ term is $-16$, what is the $1^{\rm st}$ term of the sequence? 
选项为:A:$$-4$$  B:$$16$$  C:$$17$$  D:$$11$$  E:$$14$$  请回答其中一个选项.