Evaluate the Function at the Indicated Value Of $x = b ^ { - 7 }$

Multiple Choice

Evaluate the function at the indicated value of $x = b ^ { - 7 }$ .​ $g ( x ) = \log _ { b } x$ ​

A) 7
B) 0
C) $\frac { 1 } { 7 }$
D) -7
E) $- \frac { 1 } { 7 }$