Answer:
The supported combatant commander is responsible for developing Annex V.
Explanation:
Departments or agencies are responsible for providing solutions for complex problems. In that manner, joint operation and campaign plans are devoloped in order to optimize key authorities, competences and operational abilities of other departments and agencies. When a commander plans for a department or an agency, there should be a base plan consisted of all requirements. Annex V (Interagency Coordination) of specific joint concept plans (CONPLANs) and operation plans (OPLANs) need to capture much of this required information.