What Is the Rate of Change Of $f ( t ) = \frac { 4 t - 5 } { t + 4 }$

Multiple Choice

What is the rate of change of $f ( t ) = \frac { 4 t - 5 } { t + 4 }$ with respect to t when t = 17?

A) 21
B) -21
C) $- \frac { 1 } { 21 }$
D) $\frac { 1 } { 21 }$