Which Transformation Was Not Performed on Y=sin X $y=-2 \sin (3 x+\pi / 3) ?$

Multiple Choice

Which transformation was not performed on y=sin x to obtain $y=-2 \sin (3 x+\pi / 3) ?$

A) Horizontal shift left by $\pi / 9$ units
B) Horizontal stretch by a factor of 3
C) Vertical stretch by a factor of 2
D) Reflection through the x -axis