Solve the System by Any Method, If Possible $\log _ { 7 } \frac { x y } { 7 }$

Multiple Choice

Solve the system by any method, if possible. $\log _ { 7 } \frac { x y } { 7 }$

A) $\log _ { 7 } x + \log _ { 7 } y - 1$
B) $\log _ { 7 } x - \log _ { 7 } y + 1$
C) $7 \log _ { 7 } x + \log _ { 7 } y$
D) infinitely many solutions, dependent equations
E) no solution, inconsistent system