Find the Reference Angle for the Given Angle $- 250 ^ { \circ }$

Multiple Choice

Find the reference angle for the given angle.
- $- 250 ^ { \circ }$

A) $70 ^ { \circ }$
B) $20 ^ { \circ }$
C) $160 ^ { \circ }$
D) $110 ^ { \circ }$