To enable stateful active-active SNAT on a Tier-0 or Tier-1 gateway, you must configure an Interface Group for the NSX Edge uplinks. An Interface Group is a logical grouping of NSX Edge interfaces that belong to the same failure domain. A failure domain is a set of NSX Edge nodes that share the same physical network infrastructure and are subject to the same network failures. By configuring an Interface Group, you can ensure that the stateful services are distributed across different failure domains and can recover from network failures1

Traceflow: This tool helps in troubleshooting network issues by injecting synthetic packets into the network and observing their path. It allows administrators to trace the packet flow across various network segments, making it easier to identify points of packet loss.
Packet Capture: This tool enables detailed inspection of traffic by capturing packets at specific points in the network. It allows administrators to analyze packet headers and payloads to determine if packet loss is occurring and to identify possible causes.

The correct answers are A. Files and anti-malware (file) events from the NSX Edge nodes and the Security Analyzer, D. IDS/IPS events from the ESXi hosts and NSX Edge nodes, and E. Suspicious Traffic Detection events from NSX Intelligence. According to the VMware NSX Documentation3, these are the three data collection sources that are used by NSX Network Detection and Response to create correlations/intrusion campaigns.
The other options are incorrect or not supported by NSX Network Detection and Response. East-West anti-malware events from the ESXi hosts are not collected by NSX Network Detection and Response3. Distributed Firewall flow data from the ESXi hosts are not used for correlation/intrusion campaigns by NSX Network Detection and Response3.
https://docs.vmware.com/en/VMware-NSX-T-Data-Center/3.2/administration/GUID-14BBE50D-9931-4719-8FA7-884539C0D277.html

When a stateful service (such as NAT or firewall) is enabled for the first time on a Tier-0 Gateway, the Service Router (SR) is instantiated on the NSX Edge node and automatically connected with the Distributed Router (DR). This connection enables the Tier-0 Gateway to handle stateful services by routing traffic through the SR, which manages stateful packet processing, while the DR provides distributed routing functionality.

TIER0_DISTRIBUTED_ROUTER: The Tier-0 Distributed Router spans all transport nodes, providing distributed routing capabilities across the NSX environment at the Tier-0 level.
DISTRIBUTED_ROUTER_TIER1: Similarly, the Tier-1 Distributed Router spans all transport nodes, enabling distributed routing at the Tier-1 level, which allows routing functions to occur closer to the workload VMs across the transport nodes.