Which of the following is an example of restrictions in fire support planning?

Minimum Safe Distance is an essential consideration in fire support planning as it denotes the closest distance that friendly troops can be positioned to a fire support operation without risking injury from the effects of that fire. This restriction is crucial in ensuring the safety of personnel and equipment during operations involving indirect fires.

When planning fire support, it is critical to account for the Minimum Safe Distance to prevent friendly casualties and ensure that units are effectively protected from the potential hazards of friendly fire. This aspect of fire support planning directly influences the tactical decisions made on the battlefield to maintain unit integrity and effectiveness while delivering accurate fire support.

In comparison, the other options, while related to the overall fire support planning process, do not serve as restrictions in the same sense. Max Range pertains to the furthest distance a weapon can effectively engage a target, Time on Target is related to synchronization of fires rather than a restriction, and Target Location Error involves the accuracy of the target's positioning but does not impose a direct limitation on operations.