In Cell 1,
A) $\Psi$ _p = 0 $\Psi$ _w = 0 $\Psi$

In Cell 1,

A) $\Psi$ _p = 0.0 MPa and $\Psi$ _w = 0.0 MPA.
B) $\Psi$ _p = 0.0 MPa and $\Psi$ _w = -1.0 MPa.
C) $\Psi$ _p = +0.5 MPa and $\Psi$ _w = -0.5 MPa.
D) $\Psi$ _p = -0.5 MPa and $\Psi$ _w = -0.5 MPa.
E) $\Psi$ _p = 0.0 MPa and $\Psi$ _w = +0.5 MPa.