Write the Fraction in Simplest Form $\frac { \mathrm { C } } { \mathrm { C } }$

Write the fraction in simplest form.
- $\frac { \mathrm { C } } { \mathrm { C } }$

A) $\frac { 1 } { \mathrm { C } }$
B) $c ^ { 2 }$
C) $\mathrm { C }$
D) 1