Which solution meets these requirements MOST cost-effectively?

A company has a corporate network on premises and has three VPCs in the AWS Cloud. The company has one VPC each for development, test, and, production. The company wants its system administrators to security gain remote command-line access from the corporate network to Amazon EC2 instances in the VPCs.

Which solution meets these requirements MOST cost-effectively?
A . Set up a VPN connection between the corporate network and each of the three VPCs by using AWS VPN Use Remote Desktop Protocol (RDP) or SSH over the VPN connection to access the EC2 instances remotely.
B . Configure the EC2 instances to use an instance profile that trusts AWS Systems Manager Use Systems Manager Session Manager to gain console access to the EC2 instances
C . Create a new VPC Purchase and install a virtual router from AWS Marketplace Establish a VPN connection from the corporate network to this router. Establish another VPN connection from the ‘outer to the other three VPCs Use Remote Desktop Protocol (RDP) or SSH over the VPN connection to access the EC2 instances remotely.
D . Create a new VPC Establish a VPN connection to the new VP
E . Configure peering connections between the new VPC and the existing VPCs In the new VPC create an EC2 bastion host to serve as a jump box lo EC2 instances in the other VPCs Use Remote Desktop Protocol (RDP) or SSH over the VPN connection to the bastion host

View Answer

Answer: A