The Snapshot Copy operation will make a copy of an existing snapshot that is either attached or detached from a host. The copy will capture the existing data state of the snapshot it copies. In this Copy example, a copy of an existing 4 o clock snapshot is being made. The copy inherits the parent snapshot data state of 4 o clock and its retention policy

Explanation/Reference:
UnityVSA requirements include: VMWare ESXi 5.x, 6.x
References: http://sweden.emc.com/products-solutions/trial-software-download/unity-vsa.htm

Hybrid pools can have up to 3 tiers (Extreme Performance, Performance, and Capacity).
For the Extreme Performance tier, use only SAS Flashdrives.
For the Capacity tier, use only SAS drives.

Explanation
References: https://www.emc.com/collateral/white-papers/h13827-unisphere-central-v4-wp.pdf (p.8)

Explanation/Reference:
You move Block storage from a CLARiiON CX or VNX Series storage system to an EMC Unity system.
Note: Clariion (styled CLARiiON) is a discontinued [1] SAN disk array manufactured and sold by EMC Corporation, it occupied the entry-level and mid-range of EMC's SAN disk array products. In 2011, EMC introduced the EMC VNX Series, designed to replace both the Clariion and Celerra products.
Incorrect Answers:
D: EMC RecoverPoint protects storage arrays LUNs and provides concurrent local and multiple remote data replication copies with continuous data protection for any PiT Recovery. It supports EMC VMAX 10K,
20K, 40K, VNX, VNXe3200, VNX-F, VPLEX, XtremIO and 3rd party arrays via VPLEX.