The Live Optics Collector, which is used for profiling several hardware storage arrays including the Dell XtremIO family of all-flash arrays, can run on any host with IP connectivity to the storage array being profiled. The supported operating systems for the Live Optics Collector areWindows and Linux.This is based on the information provided by the Live Optics support documentation, which outlines the process to produce an XtremIO array storage profile1.
References:
* The Live Optics support documentation provides detailed instructions on how to launch and run the Live Optics Collector, which includes the supported operating systems1.

XtremIO X2 supports configurations starting from a single X-Brick and scaling up to multiple X-Bricks.
However, the X2 system can support up to 8 X-Bricks in a cluster, not just 4, so option D is more correct.

For Microsoft Windows servers running MPIO, the optimal path selection policy when connected to an XtremIO cluster is Round Robin. This policy allows for load balancing across all available paths by distributing I/O evenly, which can lead to better performance and utilization of the storage resources.The Round Robin policy ensures that no single path is overloaded with I/O requests, which helps in maintaining consistent performance levels1.
References:
* The Dell EMC SC Series: Microsoft Multipath IO Best Practices document provides insights into the recommended path selection policies for optimal performance2.
* Additional information on MPIO and path selection policies can be found in the Dell EMC knowledge base articles1.