Why is this significant?

As of vRealize Operations (vROps) version 6.1, remote collectors can be configured into collector groups.

Why is this significant? (Choose the best answer.)
A . If the collecting node fails, another node in the collecting group can take over and resume collection
B . The more nodes in a collection group, the more collected metric data can be buffered and stored in the case of a network outage
C . Configuring a collector group, the nodes can be configured in an active-active mode which will allow for faster and increased capacity collections
D . Remote collectors of different vROps versions can be run in a collector group

Answer: D