Evaluate the Function at the Indicated Value Of $x = 1$

Multiple Choice

Evaluate the function at the indicated value of $x = 1$ . $f ( x ) = \log _ { 8 } x$

A) $\frac { 1 } { 8 }$
B) $- \frac { 1 } { 8 }$
C) -8
D) 0
E) 8