Use the Properties of Logarithms to Expand $\log _ { 3 } \sqrt { 7 x }$

Multiple Choice

Use the properties of logarithms to expand $\log _ { 3 } \sqrt { 7 x }$ .

A) $\log _ { 3 } \frac { 1 } { 2 } \cdot \left( \log _ { 3 } 7 + \log _ { 3 } x \right)$
B) $\frac { 1 } { 2 } \cdot \left( \log _ { 3 } 7 + \log _ { 3 } x \right)$
C) $\frac { 1 } { 2 } \log _ { 3 } 7 + \log _ { 3 } x$
D) $\frac { 1 } { 2 } \log _ { 3 } 7 \cdot \log _ { 3 } x$
E) $\sqrt { \log _ { 3 } 7 + \log _ { 3 } x }$