River Beds Which Are Abandoned Through the Natural Change in the Course

River beds which are abandoned through the natural change in the course of the water belong to whom?

A) Owners whose land are occupied by the new course in proportion to the area lost.
B) Owners whose land are occupied by the bed course in proportion to the length of the area lost.
C) Owners of the land adjoining the old bed in proportion to the area lost.
D) Owners of the land adjoining the new bed in proportion to the area lost.