How would you describe the difference between the graphs of f(x) = 2x^2 and g(x) = -2x^2?
A. g(x) is a reflection of f(x) over the line y=-1.
B. g(x) is a reflection of f(x) over the x-axis.
C. g(x) is a reflection of f(x) over the line y= x.
O D. g(x) is a reflection of f(x) over the yaxis.