The Primary Difference Between a Superposed Stream and an Antecedent

The primary difference between a superposed stream and an antecedent stream is that:

A) superposed streams do not meander, whereas antecedent streams have continually migrating meanders.
B) younger superposed streams follow stream beds created by ancient antecedent streams.
C) superposed streams erode deeper rock layers, whereas antecedent streams erode into a landscape that is being slowly uplifted.
D) antecedent streams build up their floodplains through deposition, while superposed streams erode downward in their floodplains.