Which of the following BEST limits the impact of server failures in a distributed environment?

A.
Redundant pathways

B.
Clustering

C.
Dial backup lines

D.
Standby power

Explanation:
Clustering allows two or more servers to work as a unit, so that when one of them fails, the other takes over.
Choices A and C are intended to minimize the impact of channel communications failures, but not a server
failure. Choice D provides an alternative power source in the event of an energy failure.