Compute and Simplify the Difference Quotient $$\frac { f ( x + h ) - f ( x ) } { h } , h \neq 0$$

Multiple Choice

Compute and simplify the difference quotient $$\frac { f ( x + h ) - f ( x ) } { h } , h \neq 0$$
- $$f ( x ) = \frac { 3 } { x + 28 }$$

A) $- \frac { 3 } { ( x + h + 28 ) ( x + 28 ) }$
B) $- \frac { 84 } { ( x + h + 28 ) ( x + 28 ) }$
C) $- \frac { 3 } { ( x + 3 ) ^ { 2 } }$
D) $\frac { 3 } { ( x + h + 28 ) ( x + 28 ) }$