Adaface Sample Terraform Questions

Consider the following Terraform 0.12 configuration snippet:

How would you define the 'cidr_block' for ap-southeast-1 in the aws_vpc resource using a variable?
            A: var.vpc_cidrs[“ap-southeast-1”]
            B: var.vpc_cidrs.0
            C: vpc_cidrs[“ap-southeast-1”]
            D: var.vpc_cidrs[0]

Consider the following Terraform code:

Which statement is true about this Terraform code?
            
            A. The code creates an EC2 instance and assigns an EIP to it within a VPC.
            B. The code creates an EC2 instance, but it is not associated with the specified security group.
            C. The code creates an EC2 instance and an EIP, but does not associate the EIP with the instance.
            D. The code creates a security group that allows SSH access to the EC2 instance from anywhere.
            E. The code creates an EC2 instance with the specified security group, but does not assign an EIP to it.

Given the following Terraform code:

What would be the value of the extra_security_group_id output when create_security_group is set to true, project_environment is set to "staging", and enable_additional_security_group is set to false?