One Type of Dehydration in Children Is Isotonic Dehydration, Which

One type of dehydration in children is isotonic dehydration, which occurs then:

A) the loss of sodium exceeds water loss and serum sodium levels are low
B) extracellular sodium is at the same level as intracellular sodium
C) the muscle tone and skin tone remain stable while the child is dehydrated
D) the loss of sodium and water are equal and the serum sodium level remains normal