Tracey Became Dehydrated During a Recent Illness,and the Levels of Sodium

Tracey became dehydrated during a recent illness,and the levels of sodium in her body were significantly reduced.What would we expect to occur if enough sodium was lost

A)  Her nervous system would become highly activated, and action potentials would be generated continuously. 
B)  More neurotransmitters would be produced in her terminal buttons. 
C)  Fewer action potentials would occur in her nervous system. 
D)  Glial cells would start to degenerate and die.