Determine a Quadratic Function That Results When Applying the Given $f ( x ) = x ^ { 2 } + 13$

Multiple Choice

Determine a quadratic function that results when applying the given shifts to the graph of f(x) = x2.
-Shift 13 units down.

A) $f ( x ) = x ^ { 2 } + 13$
B) $f ( x ) = x ^ { 2 } - 13$
C) $f ( x ) = ( x - 13 ) ^ { 2 }$
D) $f ( x ) = ( x + 13 ) ^ { 2 }$