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