Ann, the system administrator, is installing an extremely critical system that can support ZERO downtime.
Which of the following BEST describes the type of system Ann is installing?

A.
High availability

B.
Clustered

C.
RAID

D.
Load balanced

Explanation:
High Availability is he term used to refer to a system that has been secured and set up/configured in such a way
so as to be online, active and able to respond and thus have zero downtime as a result.