Natural levees are built up on the floodplain along the banks of rivers: Group of answer choices a. as floodwaters reced

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Natural levees are built up on the floodplain along the banks of
rivers:
Group of answer choices
a. as floodwaters recede from the floodplain,
b. continuously, as normal discharge conditions prevail,
c. as floodwaters rise and overflow the river banks,
d. during droughts, when the water level of the river is
low.