https://docs.vmware.com/en/VMware-NSX-Advanced-Load-Balancer/22.1/Administration_Guide/GUID-84139C37-0129-40A7-A7AB-5A93E1F65B6D.html

According to the VMware NSX Documentation, a non-preemptive failover policy means that the original failed node will not become the active node upon recovery, unless the current active node fails again.
This policy can help avoid unnecessary failovers and ensure stability.
The other options are either incorrect or not available for this configuration. Preemptive is the opposite of non-preemptive, meaning that the original failed node will become the active node upon recovery, if it has a higher priority than the current active node. Enable Preemptive and Disable Preemptive are not valid options for the failover policy, as the failover policy is a drop-down menu that only has two choices:
Preemptive and Non-Preemptive.

Explanation:
The correct answer is to enable the option All LB VIP Routes on the Tier-1 gateway route advertisement settings. This option allows the Tier-1 gateway to advertise the NSX Advanced Load Balancer LB VIP routes to the Tier-0 gateway and other peer routers, so that the end users can reach the production website by using the VIP address1. The other options are not relevant for this scenario.
To mark the correct answer by clicking on the image, you can click on the toggle switch next to All LB VIP Routes to turn it on. The switch should change from gray to blue, indicating that the option is enabled.
See the image below for reference:

In NSX, Unicast traffic type should be used in TraceFlow when validating connectivity between two specific virtual machines, such as App and DB VMs, that reside on different segments.
Unicast traffic is directed from one source to a single destination, making it suitable for testing direct connectivity between two VMs.

AS-Path Prepend: This attribute allows you to prepend one or more AS numbers to the AS path of a route, making it appear longer and less preferable to other BGP routers. You can use this attribute to manipulate the inbound traffic from your BGP peers by advertising a longer AS path for some routes and a shorter AS path for others.
MED: This attribute stands for Multi-Exit Discriminator and allows you to specify a preference value for a route among multiple exit points from an AS. You can use this attribute to manipulate the outbound traffic to your BGP peers by advertising a lower MED value for some routes and a higher MED value for others.