The following is a list of requirements from a discovery workshop for a new VMware hosting platform system design:

REQ001 - The architecture must support recoverability to the VMware Cloud Disaster Recovery (VCDR) service.

REQ002 - The architecture must support high availability (HA) and fault tolerance (FT).

REQ003 - The architecture must support reducing existing energy consumption and carbon footprint.

REQ004 - The architecture must provide support for network virtualization using distributed virtual switches.

Which requirement would be classified as a business (formerly functional) requirement?