Why Do Meandering Rivers Meander (Move)across Their Floodplain

Multiple Choice

Why do meandering rivers meander (move) across their floodplain?

A) because the large amounts of sediments that choke the rivers create point bars that are easily eroded away by additional flow of the rivers
B) because they carry very small amounts of sediment and thus are not slowed down as a result of friction between the sediment and the river bottom
C) because they are curved,which causes erosion on one side of the curve and deposition on the other side of the curve,thus moving the river in the direction of erosion
D) because sediment is constantly being deposited on the river bottom,which causes the river to overflow its banks and create a new channel