Which of the following should be used when migrating virtual machines hosted in an on-premises location to an AWS VPC?

Answer options:

A.Use a NAT instance to route traffic from the instance in the VPC.B.Use a Static IP address on the VPC instance.
C.Use AWS Server Migration Service (SMS).
D.Use the VM Import provided by AWS.

Answers: C and D
Option A is incorrect because having a NAT instance is not going to help in this scenario. NAT instance is used so that the instances in the private subnet can communicate with the internet. 
Option B is incorrect, as a static IP address will not help in "migrating a legacy application" that is located on an on-premise location
Option C is CORRECT because AWS SMS is a dedicated and agentless service that simplifies and expedites the migration to the cloud.
Option D is CORRECT because the VM Import facility provided by AWS can be used to import virtual machine images.
 https://docs.aws.amazon.com/vm-import/latest/userguide/what-is-vmimport.html