Simplify the Radical Expression $$\sqrt { z ^ { 2 } - 16 z + 64 }$$

Multiple Choice

Simplify the radical expression. If appropriate, include absolute values.
- $$\sqrt { z ^ { 2 } - 16 z + 64 }$$

A) $\mid \mathrm { z } - 8 \mathrm {~b}$
B) $| \mathrm { Z } | - 8$
C) $z - 8$
D) $- \mathrm { z } + 8$