Sand Grains Carried by Water

Sand grains carried by water:

A) become rounded more slowly than wind-blown sand because water acts as a buffer.
B) become rounded more quickly than wind-blown sand because the water acts as a buffer.
C) gain their jagged edges and become rounded more slowly than wind-blown sand because the water acts as a buffer.
D) are larger than other sand grains because they retain water weight from the water that engulfs them.