A concrete basement wall extends below the

water table as shown in the following illustration. The

total lateral pressure against the wall at a point $2\mathrm{.}4m$

below the surface is most nearly

$($A$)2\mathrm{.}6$kPa

$($B$)14$kPa

$($C$)25$kPa

$($D$)34$kPa