The sum of all the solutions of $2 + \log _ { 2 } ( x - 2 ) = \log _ { ( x - 2 ) } 8$ in the interval $( 2 , \infty )$ is\\ (A) $\frac { 35 } { 8 }$.\\ (B) 5 .\\ (C) $\frac { 49 } { 8 }$.\\ (D) $\frac { 55 } { 8 }$.