Uric Acid Produced by Insect Malpighian Tubules Does Not Influence

Uric acid produced by insect Malpighian tubules does not influence the movement of water from the hindgut because:

A) it is eliminated by the tubules before water reaches the hindgut.
B) it precipitates due to the low pH of the fluid and therefore does not contribute to osmotic pressure.
C) water moves only in response to the osmotic pressure created by proteins and sugars in the hindgut.
D) uric acid is equally concentrated in the hindgut and in the body fluids.
E) None of the answer options is correct.