Which causes a meander to form in a river?
A.the deposition of sediments at the place where a river flows into an ocean
B.the movement of the river through easily eroded rocks or sediments
C.the erosion of rock where a river flows over it and erodes the softer rock
D.the deposition of sediments on a wide, sloping area at the bottom of a mountain
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B.the movement of the river through easily eroded rocks or sediments
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