Final answer:
The Installation Deployment Commander is responsible for designating an IDO and ensuring deployment readiness at an installation.
Step-by-step explanation:
The commander responsible for ensuring the installation is capable of supporting deployment operations, including the designation of an Installation Deployment Officer (IDO) and alternates, is the b) Installation Deployment Commander. The role of the IDO is critical in managing and coordinating deployment processes to ensure readiness and efficiency. They serve as the primary point of contact for all deployment-related activities and maintain the status of resources and personnel.