vRealize Operations provides optimization capabilities like resource reclamation, compliance checks, and capacity analytics. Real-time replication (C) is not a vRealize Operations feature; vSphere Replication or other backup/DR solutions handle that functionality.

Lockdown Mode (A) restricts access, isolating the management network (C) protects host connectivity, and disabling SSH when not needed (D) reduces attack surfaces. Granting Administrator rights universally (B) is contrary to best practices.

HA and resource optimization focus on load balancing (DRS), storage redundancy (vSAN), and proper network design (segmentation for vMotion). Granting SSH access to all users by default (D) is a security risk and not a standard best practice for an HA design.

The primary purpose of configuring VM storage policies in a VMware vSphere environment is to enforce specific storage requirements such as performance, availability, and redundancy. These policies help ensure that virtual machines are placed on datastores that meet the desired service levels and characteristics.

VMFS (Virtual Machine File System) is VMware's proprietary clustered file system for block-based storage. NFS is used for file-based storage, while ZFS and EXT4 are not native to ESXi for VMFS datastores.