The river had a steady flow of water, which gently deposited sand eroded from upstream. Heavy rains caused the river to swell and increased the flow of the river by three times the amount of water. With the river water overflowing, what will happen to the mouth of the river?
A) The mouth of the river will narrow.
B) The mouth of the river will widen.
C) The mouth of the river will remain unchanged.
D) The mouth of the river will become shallower.