Which attack method is characterized by both units operating in the same Area of Attack (AOA)?

The correct answer pertains to the method where both units operate in the same Area of Attack (AOA), which is a hallmark of combined operations. In a combined attack, multiple units coordinate their efforts to strike a common objective or target, leveraging the strengths of different units while focusing their firepower in a concentrated area. This approach enhances the effectiveness of the operation, allowing for a more significant impact on the enemy by saturating a specific target area with fire from all participating units.

In contrast, tactics such as single sector operations typically involve one unit focusing on a designated area rather than multiple units collaborating in the same space. Sectored attacks divide responsibilities among different units, with each one assigned to a specific sector of the operational zone. The divide and conquer strategy usually relates to neutralizing enemy forces by separating them and tackling them individually, which does not involve simultaneous operations in the same AOA. Therefore, the definition of combined attacks aligns perfectly with the characteristics identified in the question, confirming its validity as the correct choice.