Perform the Indicated Operation $\frac { 5 x } { 13 } + \frac { 3 x } { 13 }$

Multiple Choice

Perform the indicated operation. Simplify if possible.
- $\frac { 5 x } { 13 } + \frac { 3 x } { 13 }$

A) $\frac { 13 } { 8 x }$
B) $8 \mathrm { x }$
C) $\frac { 8 x } { 13 }$
D) $\frac { 8 \mathrm { x } } { 26 }$