In the Absence of Cutoff, How Does a River Meander

Multiple Choice

In the absence of cutoff, how does a river meander loop behave over time?

A) The gradient is raised as the loop lengthens, and the channel migrates toward the cut or inner bank of the loop.
B) The gradient is raised as the loop shortens, and the channel migrates away from the cut or outer bank of the loop.
C) The gradient is lowered as the channel lengthens and migrates toward the cut or outer bank of the loop.
D) The gradient is lowered as the loop shortens, and the channel migrates toward the shallow inner bank of the loop.