Convert from Degrees to Radians $- 630 ^ { \circ }$

Multiple Choice

Convert from degrees to radians. Use the value of π found on a calculator and round answers to four decimal places, as needed.
- $- 630 ^ { \circ }$

A) $- 7 \pi$
B) $\frac { 7 \pi } { 2 }$
C) $- \frac { 7 \pi } { 4 }$
D) $= \frac { 7 \pi } { 2 }$