Find the Interval(s) Where $f ( x ) = \sqrt { x ^ { 2 } - 2 x + 3 }$

Multiple Choice

Find the interval(s) where $f ( x ) = \sqrt { x ^ { 2 } - 2 x + 3 }$ is continuous.

A) $[ 0 , \infty )$
B) $[ - 3,3 ]$
C) $( - \infty , \infty )$
D) $[ - 2,3 ]$