What Advantage Do Alluvial Terraces Have Over Floodplains for Human

What advantage do alluvial terraces have over floodplains for human settlement?

A) alluvial terraces are flat when compared to floodplains
B) floodplains tend to get covered with water when streams overbank and this is not the case for alluvial terraces
C) alluvial terraces are located near the stream bank, making obtaining water much easier
D) alluvial terraces are commonly found near the coast while floodplains are more common in steep, mountainous terrain