Add or Subtract as Indicated and Simplify If Possible $$\frac { 13 x } { - 3 x + 4 } + \frac { 7 } { - 3 x + 4 }$$

Multiple Choice

Add or subtract as indicated and simplify if possible. $$\frac { 13 x } { - 3 x + 4 } + \frac { 7 } { - 3 x + 4 }$$

A) $\frac { 91 x } { - 3 x + 4 }$
B) $\frac { 20 x } { - 3 x + 4 }$
C) $\frac { 13 x + 7 } { - 3 x + 4 }$
D) $\frac { 13 x + 7 } { - 6 x + 8 }$