The coordinates of quadrilateral EFGH are E(4, 8), F(1, 2), G(6, 1), and H(8, 8). The image of EFGH under dilation is E'F'G'H'. If the coordinates of vertex E' are (1, 2), what are the coordinates of vertex H'?
A. (2, 8)
B.(5, 6)
C. (2, 2)
D. (4, 8)