Find the Domain of the Function $g ( x ) = \sqrt { 25 - x ^ { 2 } }$

Multiple Choice

Find the domain of the function.
$g ( x ) = \sqrt { 25 - x ^ { 2 } }$

A) $- 5 \leq x \leq 5$
B) $x \leq - 5$ or $x \geq 5$
C) $x \geq 0$
D) $x \leq 5$
E) all real numbers