Which of the following allows private EC2 Instances in your VPC have the ability to work with AWS resources without the need of an an internet gateway, NAT device, public IP address, or VPN connection

Answer options:

A.PublicLink
B.VPCLink
C.PrivateLink
D.AWSLink

Answer - C
The AWS documentation mentions the following
AWS PrivateLink is a highly available, scalable technology that enables you to privately access some AWS services from your VPC. You do not require an internet gateway, NAT device, public IP address, or VPN connection to communicate with the supported AWS service. Traffic between your VPC and the service does not leave the Amazon network.
For more information on the PrivateLink, please refer to the below URL:
http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Introduction.html#what-is-privatelink