Find the Indicated Function Value $g ( a - 1 )$

Multiple Choice

Find the indicated function value.
-Find $g ( a - 1 )$ when $g ( x ) = \frac { 1 } { 5 } x - 5$

A) $\frac { a + 26 } { 5 }$
B) $\frac { a - 26 } { 5 }$
C) $\frac { a - 30 } { 5 }$
D) $\frac { a - 51 } { 5 }$