Drinking Seawater Is Dehydrating to Humans Because

Drinking seawater is dehydrating to humans because

A) there is a net flow of water molecules out of the cells because the solution is hypertonic.
B) there is a net flow of water molecules out of the cells because the solution is hypotonic.
C) there is a net flow of hydrated Na⁺, Cl^-, and other ions into the cells because the solution is hypertonic.
D) there is a net flow of hydrated Na⁺, Cl^-, and other ions into the cells because the solution is hypotonic.
E) the hydrated Na⁺, Cl^-, and other ions block channels in the cell membrane, preventing water molecules from migrating into or out of the cells.