6. A diver initially moving horizontally with speed v dives off the edge of a vertical cliff and lands in the water a distance d from the base of the cliff. How far from the base of the cliff would the diver have landed if the diver initially had been moving horizontally with speed 2 v ?
(A) d
(B) 2d
(C) 2d
(D) 4d
(A) d
(B) 2d
(C) 2d
(D) 4d