which refers to the sum of all the forces that act upon an object?\no absolute force\no net force\no…

Brief Explanations:

In physics, the sum of all forces acting on an object is defined as the net - force. Absolute force is not a standard term in this context. Positive force is not the sum of all forces. A balanced force implies the net - force is zero, but it's not the general term for the sum of all forces.

Answer:

B. net force