In VCF Operations, is it possible to use both Allocation and Demand models simultaneously for the same cluster?

A team uses Ansible (Open Source) heavily for application configuration. They want to drag-and- drop their existing Ansible Playbooks onto the VCF Automation design canvas to run post-provisioning tasks on new VMs.
Which prerequisite must be met to enable this capability?

A VCF Operations for Networks environment is showing an alert: "Platform Disk Usage Critical".
The administrator notices that the search performance is degraded.
Which operational task provides immediate relief while maintaining the most recent high-value data?

To collect data from physical network devices (Switches, Routers, Firewalls) into VCF Operations for Networks, what information is typically required during the Data Source configuration? (Choose 2.)

A Solution Architect is designing a VCF Operations cluster for a financial institution that requires zero downtime even in the event of a complete data center failure.
# Requirements
- RPO: 0 (No data loss)
- RTO: Near Zero (Automated failover)
- Architecture: Dual-Site (Active/Active capable)
Which availability mode must be selected during the sizing and deployment phase to meet these strict criteria?