Which of the Following Is Not Part of the Transpiration-Cohesion-Tension

Which of the following is not part of the transpiration-cohesion-tension mechanism for the ascent of xylem sap?

A) loss of water from the mesophyll cells, which initiates a pull of water molecules from neighboring cells
B) transfer of transpirational pull from one water molecule to the next, owing to cohesion by hydrogen bonds
C) hydrophilic walls of tracheids and vessels that help maintain the column of water against gravity
D) active pumping of water into the xylem of roots
E) lowering of in the surface film of mesophyll cells due to transpiration