What is not one of the drawbacks of a hot site?

A.
Need Security controls, as it usually contain mirror copies of live production data

B.
Full redundancy in hardware, software, communication lines, and applications lines is very
expensive

C.
The hot sites are available immediately or within maximum allowable downtime (MTD)

D.
They are administratively resource intensive, as transaction redundancy controls need to be
implemented to keep data up-to-date