Which of the following scenarios is an example of cohesion?

A.
Water molecules stick to the surface of a mirror.
B.
Water sticks to the walls of blood vessels.
C.
Water molecules stay on the tip of a pine needle because the water is attracted to the surface of the needle.
D.
Water molecules stick to one another and form a bead

Cohesion is an ability of water molecule to stick to one another due to the presence of hydrogen bonding

There is an explanation video available below.

What is the product of (frac{27}{5}), ((3)^{-3}) and ((frac{1}{5})^{-1})?