What is a hot-site facility?

A. A site with pre-installed computers, raised flooring, air conditioning, telecommunications and networking equipment, and UPS.
B. A site in which space is reserved with pre-installed wiring and raised floors.
C. A site with raised flooring, air conditioning, telecommunications, and networking equipment, and UPS.
D. A site with ready made work space with telecommunications equipment, LANs, PCs, and terminals for work groups.