Solve $8 \sqrt { x + 1 } = 9$ , If Possible

Multiple Choice

Solve $8 \sqrt { x + 1 } = 9$ , if possible.

A) x=7
B) $x = \frac { 1 } { 8 }$
C) x= $\frac { 17 } { 64 }$
D) $x = \frac { 9 } { 8 }$
E) no solution