Find $f \circ g$ And the Domain of the Composite Function $f ( x ) = \sqrt { x + 5 } , g ( x ) = x ^ { 2 }$

Multiple Choice

Find $f \circ g$ and the domain of the composite function.​ $f ( x ) = \sqrt { x + 5 } , g ( x ) = x ^ { 2 }$ ​

A) $( x + 5 ) ^ { 2 }$ Domain of $f \circ g$ : all real numbers x
B) $\sqrt { x ^ { 2 } + 5 }$ Domain of $f \circ g$ : all real numbers x
C) $- \sqrt { ( x + 5 ) ^ { 2 } }$ Domain of $f \circ g$ : all real numbers x
D) $( x - 5 ) ^ { 2 }$ Domain of $f \circ g$ : all real numbers x
E) $\sqrt { ( x - 5 ) ^ { 2 } }$ Domain of $f \circ g$ : all real numbers x