Condense the Expression Below to the Logarithm of a Single $\frac { 5 } { 2 } \log _ { 8 } ( z - 1 )$

Multiple Choice

Condense the expression below to the logarithm of a single quantity. $\frac { 5 } { 2 } \log _ { 8 } ( z - 1 )$

A) $\log _ { 8 } ( \sqrt [ 5 ] { z } - 1 )$
B) $\log _ { 8 } \left( \sqrt { z ^ { 5 } } - 1 \right)$
C) $\log _ { 8 } \sqrt [ 5 ] { z - 1 }$
D) $\log _ { 8 } \frac { 5 ( z - 1 ) } { 2 }$
E) $\log _ { 8 } \sqrt { ( z - 1 ) ^ { 5 } }$