Perform the Indicated Operation $\frac { 4 } { 3 x } - \frac { 3 } { 10 x ^ { 2 } }$

Multiple Choice

Perform the indicated operation. Simplify if possible.
- $\frac { 4 } { 3 x } - \frac { 3 } { 10 x ^ { 2 } }$

A) $\frac { 31 x } { 30 x ^ { 2 } }$
B) $\frac { 31 } { 30 x }$
C) $\frac { 1 } { 30 x ^ { 3 } }$
D) $\frac { 40 x - 9 } { 30 x ^ { 2 } }$