Convert the Degree Measure to Radians $\pi .$ - $- 270 ^ { \circ }$

Multiple Choice

Convert the degree measure to radians. Leave answer as a multiple of $\pi .$
- $- 270 ^ { \circ }$

A) $- \frac { 3 \pi } { 2 }$

B) $- 3 \pi$

C) $\frac { 3 \pi } { 2 }$

D) $- \frac { 3 \pi } { 4 }$