Starting with the Graph Of $y=e^{x}$ , Find the Equation of the Graph That Results from of the Graph

Multiple Choice

Starting with the graph of $y=e^{x}$ , find the equation of the graph that results from reflecting about the line $y=3$ .

A) $y=e^{x}$
B) $y=3$
C) $y=-e^{x}+6$
D) $y=e^{-x}+6$
E) $y=-e^{x+6}$