This question has options. Select from options: Read this fact: "when a river floods , that river deposits sediment in flood plains"

Now answer this question: "More dirt and sand gets deposited in a flat area near a river whenever"

Pick your answer from:
(a). the river is hit with an extremely large amount of precipitation in a day
(b). a deer is hunted on the river bank
(c). birds fly over the area
(d). a helicopter flies too low over the land
(a).