What are the three options if a Guard is overextended?

The correct choice highlights three critical tactical responses to address a situation where a Guard unit becomes overextended. "Reinforce" indicates that additional troops may be brought in to support the overextended position, enhancing its defensive capabilities and allowing it to withstand pressure or continue operations more effectively. "Reduce the AO" refers to the need to scale back the area of operations, thus simplifying the Guard's responsibilities and allowing for a stronger focus on the remaining critical zones. Finally, "Guard some and screen the rest" emphasizes a strategic allocation of resources, where certain high-priority areas are secured while other less critical locations are monitored, thereby optimizing the overall defensive posture.

In contrast, the other options focus on different tactical approaches that may not be as effective in managing an overextended Guard. Options that suggest advancing aggressively or consolidating may not address the immediate issue of overextension and could lead to further risks. Instead, the correct choice provides a balanced and strategic framework to reinforce and stabilize the situation.