Analysis of a mouse's urine and plasma indicate a U/P ratio of 2.5.These results suggest that the mouse's kidney was

A) taking a lot of water but very few solutes from the plasma.
B) taking very little water and many solutes from the plasma.
C) taking a lot of water and many solutes from the plasma.
D) taking very little water and very few solutes from the plasma.
E) maintaining an equal rate of flow of water and solutes into and out of the plasma.