$y \leq 3x+1,\;x-y>1,$ which of the following ordered pairs $(x,y)$ satisfies the system of inequalities below ?

Question

$\begin{array}{1 1} (a)\;(-2,-1) \\ (b)\;(-1,3) \\ (c)\; (1,5) \\ (d)\; (2,-1) \end{array}$