Water Is Moving Across a Membrane from Solution a into Solution

Water is moving across a membrane from solution A into solution B.What can be inferred?

A) Solution A must be pure water.
B) Solution A must have a lower solute concentration than Solution B.
C) Solution A must have a higher solute concentration than Solution B.
D) Solution A and Solution B must have the same concentration of solutes.
E) Solution B must be pure water.