What is the measure of one of larger angles of a parallelogram in the $xy$-plane that has vertices with coordinates $(2, 1)$, $(5, 1)$, $(3, 5)$ and $(6, 5)$?
(A): $93.4$
(B): $96.8$
(C): $104.0$
(D): $108.3$
(E): $119.0$
Now the answer strip says (C), but it doesn't explain how to find the angle. So how would I go about solving this question? I've tried drawing in a plane but I couldn't relate my drawing to the angles.