Am advantage of the use of hot sites as a backup alternative is that:

A. the costs associated with hot sites are low.

B. hot sites can be used for an extended amount of time.

C. hot sites can be made ready for operation within a short period of time.

D. they do not require that equipment and systems software be compatible with the primary site.

Explanation:

Hot sites can be made ready for operation normally within hours. However, the use of hot sites is expensive, should not be considered as a long-term solution, and requires that equipment and systems software be compatible with the primary installation being backed up.