Evaluate the Function as Indicated $g(a-1)$ When $g(x)=3 x-2$

Evaluate the function as indicated.
-Find $g(a-1)$ when $g(x) =3 x-2$

A) $3 a-2$
B) $3 a-5$
C) $\frac{1}{3} a-2$
D) $3 a+1$