Freshwater flatworms produce urine that is typically

A)of high solute concentration, in order to conserve body fluids.
B)of very low volume, in order to conserve body fluids.
C)of high solute concentration and very low volume, in order to conserve body fluids.
D)of high solute concentration and of high volume, matching their normal fluid uptake.
E)of low solute concentration and of high volume, matching their normal fluid uptake.