Perform the Operation Indicated $\frac { 9 x ^ { 2 } } { x - 1 } - \frac { 9 x } { x - 1 }$

Multiple Choice

Perform the operation indicated. Simplify.
- $\frac { 9 x ^ { 2 } } { x - 1 } - \frac { 9 x } { x - 1 }$

A) $\frac { 9 x } { x - 1 }$
B) 9
C) $\frac { 9 x ( x + 1 ) } { x - 1 }$
D) $9 \mathrm { x }$