Give an Expression That Generates All Angles Coterminal with the Given

Multiple Choice

Give an expression that generates all angles coterminal with the given angle. Let n represent any integer.
- $- 210 ^ { \circ }$

A) $- 210 ^ { \circ } + \mathrm { n } \cdot 180 ^ { \circ }$
B) $- 210 ^ { \circ } + \mathrm { n } \cdot 90 ^ { \circ }$
C) $- 210 ^ { \circ } + \mathrm { n } \cdot 360 ^ { \circ }$
D) $- 210 ^ { \circ } + 2 n \pi$