How should the user define the security rule for SSH?

A user has created a VPC with CIDR 20.0.0.0/16 with only a private subnet and VPN connection
using the VPC wizard. The user wants to connect to the instance in a private subnet over SSH.
How should the user define the security rule for SSH?

A.
Allow Inbound traffic on port 22 from the user’s network

B.
The user has to create an instance in EC2 Classic with an elastic IP and configure the security
group
of a private subnet to allow SSH from that elastic IP

C.
The user can connect to a instance in a private subnet using the NAT instance

D.
Allow Inbound traffic on port 80 and 22 to allow the user to connect to a private subnet over the
Internet

Explanation:
The user can create subnets as per the requirement within a VPC. If the user wants to connect
VPC from his own data centre, the user can setup a case with a VPN only subnet (private. which
uses VPN access to connect with his data centre. When the user has configured this setup with
Wizard, all network connections to the instances in the subnet will come from his data centre. The
user has to configure the security group of the private subnet which allows the inbound traffic on
SSH (port 22. from the data centre’s network range.