Reference:
https://docs.paloaltonetworks.com/content/dam/techdocs/en_US/pdf/pan-os/10-0/pan-os-admin/pan-os-admin.pdf page 315

Explanation
A and D are the best practice deployment modes for the firewall if the company wants to add threat prevention to the network without redesigning the network routing. This is because these modes allow the firewall to act as a transparent device that does not affect the existing network topology or routing1.
A: VirtualWire mode allows the firewall to be inserted into any existing network segment without changing the IP addressing or routing of that segment2. The firewall inspects traffic between two interfaces that are configured as a pair, called a virtual wire. The firewall applies security policies to the traffic and forwards it to the same interface from which it was received2.
D: Layer 2 mode allows the firewall to act as a switch that forwards traffic based on MAC addresses3.
The firewall inspects traffic between interfaces that are configured as Layer 2 interfaces and belong to the same VLAN. The firewall applies security policies to the traffic and forwards it to the appropriate interface based on the MAC address table3.
Verified References:
1: https://www.garlandtechnology.com/blog/whats-your-palo-alto-ngfw-deployment-plan
2:
https://docs.paloaltonetworks.com/pan-os/10-1/pan-os-admin/networking/configure-interfaces/virtual-wire
3:
https://docs.paloaltonetworks.com/pan-os/10-1/pan-os-admin/networking/configure-interfaces/layer-2.htm

Explanation
According to Palo Alto Networks documentation123, multi-factor authentication (MFA) is a method of verifying a user's identity using two or more factors, such as something they know, something they have, or something they are.
The firewall supports MFA for administrative access, GlobalProtect VPN access, and Captive Portal access.
The firewall can integrate with external MFA providers such as RSA SecurID, Duo Security, or Okta Verify.
The three firewall MFA factors that are supported by PAN-OS are:
User logon: This is something the user knows, such as a username and password.
One-Time Password: This is something the user has, such as a code generated by an app or sent by email or SMS.
Push: This is something the user is, such as a biometric verification or a device approval.

The destination zone in the NAT rule is determined after the route lookup of the destination IP address in the original packet (that is, the pre-NAT destination IP address). https://docs.paloaltonetworks.com/pan-os/10-1/pan-os-networking-admin/nat/nat-configuration-examples/destination-nat-exampleone-to-one-mapping The NAT rule destination zone should be set to the zone where the traffic is destined before NAT. In this case, the traffic from the internet is destined to the pre-NAT IP address of the server, which is 153.6.12.10. This IP address belongs to the Outside zone, as shown in the routing and interfaces information. Therefore, the NAT rule destination zone should be set to Outside. The other options are not correct. None is not a valid option for the NAT rule destination zone. Inside and DMZ are the zones where the traffic is destined after NAT, which is 192.168.10.10. Reference: : https://docs.paloaltonetworks.com/pan-os/10-2/pan-os-admin/networking/nat/source-and-destination-nat/configure-destination-nat