Find a Composite Function Form for Y If $y = 4 + \sqrt { x ^ { 2 } + 3 }$

Multiple Choice

Find a composite function form for y if: $y = 4 + \sqrt { x ^ { 2 } + 3 }$

A) $u = x ^ { 2 } , y = 4 + \sqrt [ 3 ] { u }$
B) $u = x ^ { 2 } + 3 , y = \sqrt [ 4 ] { u }$
C) $u = x ^ { 2 } + 3 , y = 4 + u$
D) $u = x ^ { 2 } + 3 , y = \sqrt { u }$
E) $u = x ^ { 2 } + 3 , y = 4 + \sqrt { u }$