In a system in equilibrium, what is true about its rotation?

In a system that is in equilibrium, it is essential for the moments, or torques, acting on the system to balance each other. This means that the sum of clockwise moments must equal the sum of counter-clockwise moments. This balance ensures that there is no net torque acting on the system, which would otherwise cause it to rotate. Therefore, the correct answer emphasizes the necessity of this balance in preventing any rotational motion, which is a key characteristic of equilibrium.

The other options suggest various forms of movement or forces that do not apply to a system in equilibrium. For example, stating that the system will rotate counter-clockwise implies that there is a net torque causing movement, contradicting the definition of equilibrium. Moreover, claiming that no force is being exerted is inaccurate because equilibrium can occur while forces are still present, provided they balance out. Lastly, the idea that the system will rotate under the largest force misrepresents the condition of equilibrium, where the presence of unbalanced forces or torques would mean the system is not at rest.