Which of the following is a responsibility of the J2 regarding multinational intelligence support?

The responsibility of assuring unity of effort against a common threat falls under the purview of the J2, which is focused on intelligence. The J2 coordinates intelligence sharing and ensures that all participating nations in a multinational operation are aligned in their understanding of threats and challenges they face. This is critical in multinational operations, as differing national perspectives on intelligence can lead to confusion or misalignment in operations. By promoting unity of effort, the J2 helps streamline decision-making processes and enhances the effectiveness of the coalition against the identified threats.

The other responsibilities offered in the choices are not specifically under the direct oversight of the J2. While providing a budget plan and conducting exercises are essential for operational planning and readiness, they typically fall under different aspects of military planning and execution. Monitoring security protocols is a vital activity but is usually more aligned with the J6 or communications and information systems. Thus, ensuring unity of effort through coordinated intelligence support is distinctly a core function of the J2 in the context of multinational operations.