AMC 8 2014 Problem 15

The circumference of the circle with center $O$ is divided into $12$ equal arcs, marked the letters $A$ through $L$ as seen below. What is the number of degrees in the sum of the angles $x$ and $y$?

$\textbf{(A) }75 \textbf{(B) }80 \textbf{(C) }90 \textbf{(D) }120 \textbf{(E) }150$