Which of the following are used to ensure instances in the private subnet can communicate with the Internet. Choose 2 answers from the options below.

Answer options:

A.Internet gateway
B.NAT Instances
C.NAT Gateway
D.AWS Direct Connect

Answer – B and C
The AWS documentation mentions the following
Customer EC2 instances in a private subnet sometimes need to communicate with the public Internet. A NAT device enables this connection, replacing internal servers’ private IP addresses with public IP addresses on the way out of the network, and retranslating response IP addresses on the way back in. AWS offers two types of NAT options: NAT gateways and NAT instances. NAT gateways are AWS managed while customers are responsible for managing NAT instances. NAT gateways provide better availability and bandwidth over individual NAT instances, however customers can leverage multiple NAT instances to increase availability and network performance
For more information on VPC egress traffic, please refer to the below link:
https://aws.amazon.com/answers/networking/controlling-vpc-egress-traffic/