A Navigable (In the Legal Sense)river Runs Along the Boundary

Multiple Choice

A navigable (in the legal sense) river runs along the boundary between New York and Pennsylvania.Ned owns a farm along the New York side of the river Pete owns a farm in Pennsylvania across the river from Ned's farm.Who owns the riverbed, or at least part thereof, between the farms:

A) Ned and Pete.
B) New York and Pennsylvania.
C) New York.
D) Pennsylvania.
E) The United States.