单项选择题

A.Thereareseveralfunctioningnon-Windowsserversinthesamerackthatareconnectedtothesameuninterruptiblepowersupply(UPS).WhichofthefollowingistheMOSTlikelycauseofthereboots?()
A.TheUPSismalfunctioning.
B.Theusertraffictotheserveristoohigh.
C.ABSODisoccurring.
D.Thenon-WindowsserverscannotbelocatedonthesameUPSastheWindowsserver.