Expand Assume That All Variables Represent Positive Real Numbers $\log _ { 3 } \left( \frac { \sqrt { x } } { 81 } \right)$

Multiple Choice

Expand. Assume that all variables represent positive real numbers.
- $\log _ { 3 } \left( \frac { \sqrt { x } } { 81 } \right)$

A) $\log _ { 3 } \sqrt { x } - \log _ { 3 } 81$
B) $\frac { 1 } { 2 } \log _ { 3 } x - 4$
C) $\frac { 1 } { 2 } \log _ { 3 } x - \log _ { 3 } 81$
D) $\log _ { 3 } \sqrt { x } - 4 \log _ { 3 } 3$