Evaluate the Function $f ( x ) = \log _ { 4 } x$

Multiple Choice

Evaluate the function $f ( x ) = \log _ { 4 } x$ at $x = \frac { 1 } { 16 }$ without using a calculator.

A) $- 1$
B) $- 2$
C) $- 3$
D) 16
E) $\frac { 1 } { 16 }$