Which of the following is a valid terraform import command?

In Terraform, the import command allows you to take existing infrastructure and bring it under Terraform management, which is essential for integrating resources that were created outside of Terraform. The correct syntax for the import command is crucial for it to function properly.

For option C, the command terraform import 'aws_instance.baz[0]' i-abcd1234 is correctly structured. This command designates the specific resource type—here, an AWS EC2 instance with an index in a list—followed by the unique identifier of the existing resource. The use of quotes around aws_instance.baz[0] helps to appropriately escape special characters for the Terraform command line, ensuring the correct parsing of the resource address.

The use of the index [0] indicates that this is the first instance of a resource within a list, which corresponds with how Terraform handles indexed resources. The second part of the command, i-abcd1234, is the identifier of the existing AWS instance, formatted correctly to satisfy Terraform’s requirements for association with a resource.

Thus, this option conforms to the necessary syntax and structure for a valid Terraform import command, effectively facilitating the import process of the specified AWS instance.