Which answer choice describes the transformation of the quadratic function y = -4x2 from the parent function y = x2? A. A vertical stretch by a scale factor of four with a reflection about the x-axis and a horizontal shift to the left one unit
B. A vertical stretch by a scale factor of four and a reflection about the x-axis
C. A vertical shift down four units
D. A vertical reflection about the x-axis, and a vertical compression by a scale factor of four