Solve the Equation $\log _ { 8 } x ^ { 2 } = \log _ { 8 } ( 3 x + 28 )$

Multiple Choice

Solve the equation.
- $\log _ { 8 } x ^ { 2 } = \log _ { 8 } ( 3 x + 28 )$

A) 7
B) $\frac { 7 } { 8 }$
C) $7 , - 4$
D) $\varnothing$