Perform the Indicated Operation $\frac { 3 a } { b } + \frac { 3 b } { 2 }$

Multiple Choice

Perform the indicated operation. Simplify if possible.
- $\frac { 3 a } { b } + \frac { 3 b } { 2 }$

A) $\frac { 6 a + 3 b } { 2 b }$
B) $\frac { 6 a + 3 b ^ { 2 } } { 2 b }$
C) $6 a + 3 b ^ { 2 }$
D) $\frac { 3 a + 3 b } { 2 b }$