You have created a custom VPC and created a subnet. You have launched an EC2 in the subnet and selected Auto-Assign Public IP as "Enabled". You noticed after the launch of the EC2 Instance that EC2 instance has not been assigned to any public IP address. What changes need to be done to ensure the EC2 instance can get a public IP address. Chose 2 answers from the given options

Answer options:

A.Ensure an Internet Gateway is attached to the VPC
B.Ensure the Auto-Assign IP4 attribute for the subnet is "Enabled"
C.Ensure that EC2 instance is in Public Subnet.
D.Ensure that when the wizard is used during launch time of the EC2 instance, the setting is marked as enabled for Public IP for the EC2 instance

Correct Answer: A & C
 
The requirement is EC2 instance is already launched and Public IP has not been assigned even while creating instance Auto-Assign Public IP was selected "Enabled" . Now we need to take further action so that EC2 get public IP
To do this our approach should be check 
1. IGW has been assigned to VPC
2. EC2 instance should be launched in public subnet
Option D: since instance has already been launched going back is absolutely no way to take any further action.
Option B: While launching EC2 instance, "Auto-Assign Public IP" has 3 option 
1.use the subnet setting (Enabled)
2. Enabled
3. Disabled
Since we have already selected "Enabled" so this option is not a possible answer.