Which of the following explains the concave meniscus of water in a clean glass tube? the

• A.adhension between water and glass molecules is greater than the sdhension between water molecules
• B.cohension between water molecules is greater then the adhension between glass and water molecule
• C.molecules of water near the glass move faster than the molecules at the centre of the tube
• D.molecules of water at the water-air boundary are often attracted to the centre of the tube
• E.weight of the water pulls the centre part of the surface down