Which function transforms the graph of y=x^2 so that it is first shifted up 3 units and is then reflected across the x-axis?

a. y=-(x+3)^2
b. y=(-x)^2+3
c. y=-x^2+3
d. y=-x^2-3
which function transforms the graph of y=x^2 so that it is first shifted up 3 units and is then reflected across the x-axis?

a. y=-(x+3)^2
b. y=(-x)^2+3
c. y=-x^2+3
d. y=-x^2-3