Evaluate If Possible $110 ^ { - 1 / 2 }$

Multiple Choice

Evaluate if possible. If the expression is not a real number, so state.
- $110 ^ { - 1 / 2 }$

A) $\frac { 1 } { 100 }$
B) $- \frac { 1 } { 10 }$
C) $\frac { 1 } { 10 }$
D) - 10