Order the group of parabolas from widest to narrowest
y = 1/4x 2, y = -1/2x 2, y = 3/2x 2
a.
y = 1/4x 2, y = 3/2x 2, y = -1/2x 2
b.
y = -1/2x 2, y = 1/4x 2, y = 3/2x 2
c.
y = 1/4x 2, y = -1/2x 2, y = 3/2x 2
d.
y = 3/2x 2, y = -1/2x 2, y = 1/4x 2