The steps involved in gas exchange in a fish are shown in random order. v - water passes over the gills. w - water moves through the mouth. x - water passes through slits on both sides of the fish. y - oxygen moves into the blood. z - carbon dioxide moves into the water. which lists the correct order of the steps? a) v, w, x, y, z b) x, z, w, v, y c) w, x, y, z, v d) w, v, y, z, x