Line segment AB has endpoints A(1, 4) and B(2, 8) . A dilation, centered at the origin, is applied to AB¯¯¯¯¯ . The image has endpoints A′(1/8, 1/2) and B′(1/4, 1) .

What is the scale factor of the dilation?

A.1/8
B.1/2
C.2
D.8