Multiply, and Then Simplify If Possible $( \sqrt { x - 3 } + 4 ) ^ { 2 }$

Multiple Choice

Multiply, and then simplify if possible. Assume all variables represent positive real numbers.
- $( \sqrt { x - 3 } + 4 ) ^ { 2 }$

A) $x + 8 \sqrt { x - 3 } + 16$
B) $x + 8 \sqrt { x - 3 } + 19$
C) $x + 8 \sqrt { x - 3 } + 49$
D) $x + 8 \sqrt { x - 3 } + 13$