An organization is developing a disaster recovery plan that requires data to be backed up and available at a moment's notice.
Which of the following should the organization consider FIRST to address this requirement?

A. Implement a change management plan to ensure systems are using the appropriate versions.
B. Hire additional on-call staff to be deployed if an event occurs.
C. Design an appropriate warm site for business continuity.
D. Identify critical business processes and determine associated software and hardware requirements.