A Stream Crossing a Delta Splits into a Network of Distributaries

A stream crossing a delta splits into a network of distributaries because:

A) an increase in stream velocity and discharge causes the stream to cut a new stream channel away from the delta.
B) as waves and shoreline currents erode the delta, the stream seeks new areas in which to deposit its load.
C) as the delta grows, the decreased stream gradient causes greater sedimentation and clogging of the delta channels.
D) the stream eventually encounters erosion- resistant rocks that steer it away from the delta.