When adding another server to an existing rack mount system, which of the following should the administrator consider FIRST?

The UPS provides backup power and regulates power for all equipment in the rack. Adding a new server increases the electrical load, and if the UPS's capacity is exceeded, it could lead to system instability or immediate power failure for all connected devices.

Rack temperature is an important consideration for cooling but is secondary to ensuring adequate power supply, as an overloaded UPS would cause an immediate operational failure.

Room temperature is a general environmental concern for a data center, but the immediate impact of adding a server is on the rack's specific power and cooling capacity.

Ease of access is a logistical and maintenance consideration, not an immediate operational infrastructure limitation like power capacity.