Find the Function Value Indicated for the Function $z ( x ) = \sqrt { ( x + 7 ) ^ { 2 } }$

Multiple Choice

Find the function value indicated for the function. If necessary, round to two decimal places. If the function value is not a real number and does not exist, state so.
- $z ( x ) = \sqrt { ( x + 7 ) ^ { 2 } }$ for $z ( - 3 )$

A) 16
B) 4
C) not a real number
D) 58