which of the following services that would otherwise be unavailable (Choose Three)?

vCenter Server allows you to centrally manage hosts and use which of the following services that would otherwise be unavailable (Choose Three)?

A.
High Availability (HA)

B.
Resource Pools

C.
Distributed Resource Scheduler (DRS)

D.
Data Recovery

E.
Host Health Status

Explanation:
Mastering VMware vSphere, page 59.
However, to utilize the advanced features of the vSphere product suite features such as Update Manager, VMotion, VMware DRS, VMware HA, vNetwork Distributed Switches, host profiles, or VMware FT vCentre Server must be licensed, installed and configured correctly.
VMware Data Recovery datasheet, page 1.
VMware Data Recovery is composed of three main components: 1) The user interface plug-in for VMware vCenter Server, 2) The VMware Data Recovery virtual appliance that manages the backup and recovery process, and 3) The de-duplicated destination storage.