James wanted to find out how the amount of water affected the rate at which mould grows on a slice of bread. 4 different slices of bread had different amounts of water sprinkled on them as shown below:Bread W: No waterBread X: Two drops of water Bread Y: Five drops of water Bread Z: Eight drops of waterArrange the slices of bread in order at which bread would grows. Begin with the fastest.
选项：

A: W,X,Y,Z
B:W,Z,X,Y
C:Z,Y,X,W
D:Z,W,Y,X