In Which of the Following Would There Be the Greatest

Multiple Choice

In which of the following would there be the greatest need for osmoregulation?

A) an animal connective tissue cell bathed in isotonic body fluid
B) cells of a tidepool animal such as an anemone
C) a red blood cell surrounded by plasma
D) a lymphocyte before it has been taken back into lymph fluid
E) a plant being grown hydroponically (in a watery mixture of designated nutrients)