Describe how the graph of y=x^2 can be transformed to the graph of the given equation.
y=(x+6)^2-9
A.Shift the graph of the parent function right 6 units and then down 9 units
B.Shift the graph of of the parent function up 6 units and then right 9 units
C.Shift the graph of the parent function down 6 units and then left 9 units.
D.Shift the graph of the parent function left 6 units and then down 9 units.