Why DON'T Water Molecules Located Within a Column of Xylem

Question

Why DON'T water molecules located within a column of xylem sap move apart?
A) Cohesion holds the water molecules to each other; adhesion holds water molecules to the cellulose in plant cell walls.
B) Adhesion holds the water molecules to each other; tension holds water molecules to the cellulose in plant cell walls.
C) Tension holds the water molecules to each other; cohesion holds water molecules to the cellulose in plant cell walls.
D) Adhesion holds the water molecules to each other; cohesion holds water molecules to the cellulose in plant cell walls.

Accepted Answer

Cohesion between water molecules, due to hydrogen bonding, keeps them together, while adhesion between water molecules and the cellulose in plant cell walls helps in upward movement through the xylem.