A dialyzing machine has a membrane that is permeable to water, urea, uric acid, ammonia, salts, and glucose. The membrane is impermeable to protein molecules. In relation to the blood flowing
through the dialysis machine, the dialyzing solution must have:

a. the same concentrations of urea and salts

b. lower concentrations of glucose and protein

c. lower concentrations of urea, uric acid, and ammonia and higher or equal concentrations of glucose

d. higher concentrations of urea, uric acid, and ammonia and lower or equal concentrations of glucose