In this task, you are given a question and a context passage. You have to answer the question based on the given passage.
Q: How is the system affected if there is an action-reaction force shared between any two objects in the closed system?, Context: This means that in a closed system of particles, there are no internal forces that are unbalanced. That is, the action-reaction force shared between any two objects in a closed system will not cause the center of mass of the system to accelerate. The constituent objects only accelerate with respect to each other, the system itself remains unaccelerated. Alternatively, if an external force acts on the system, then the center of mass will experience an acceleration proportional to the magnitude of the external force divided by the mass of the system.:19-1
A:
remains unaccelerated