Which of the following describes the net force acting on an object?

A. The sum of all forces acting on an object
B. The gravitational force minus any contact forces acting on an object
C. The difference between the normal force and the gravitational force acting
on an object
D. The sum of all the forces acting on an object in the same direction

the answer should be A. the sum of all forces acting on an object

Explanation:

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.