A dilation at the origin is simply a multiplication of the coordinates of the preimage by the scale factor. From <span>A(-6, -7), B(4, -2), and C(0, 7) we multiply by the scale factor of 2, the dilated coordinates are:
</span><span>A'(-12, -14), B'(8, -4), and C'(0, 14).
From which you should have no problem locating the correct answer choice.