What is NOT true about how terraces form?

A) most terraces were once part of a floodplain
B) according to superposition, the lowest terrace is the oldest
C) terraces develop along a river that is incising eroding) downward
D) a river can have more than one level of terraces

Terraces

Flat or stepped surfaces carved into landscapes by natural processes like erosion or by human activities in agriculture or building.

Superposition

A principle stating that in an undisturbed sequence of sedimentary layers, each layer is younger than the one below it and older than the one above it.

Incising

Incising is the process by which a river or stream cuts down into its bed, deepening the channel through the erosion of sediment and rock.