You are working with Terraform on your laptop and have been tasked with spinning up multiple compute instances in Oracle Cloud Infrastructure (OCI) for a project. In addition, you are also required to collect IP addresses of provisioned instances and write them to a file and save it in your laptop. Which specific Terraform functionality can help accomplish this task? (Choose the best)

The requirement is to perform an action on the local machine (the laptop running Terraform) after a resource is created in OCI. The local-exec provisioner is designed for this exact purpose. It invokes a local executable after a resource is created or destroyed. In this scenario, it can be used to run a script that takes the IP addresses of the newly created instances as input and writes them to a local file. This happens on the machine where the terraform apply command is executed.

A. The remote-exec provisioner runs scripts on the remote resource that Terraform creates (e.g., on the new compute instance), not on the local machine.
B. Terraform remote state is a feature for storing the state file in a shared, remote location, which is unrelated to executing local scripts.
C. Terraform modules are reusable packages of Terraform configurations for creating and managing resources, not for executing local commands post-provisioning.

1. HashiCorp Terraform Documentation, "Provisioners - local-exec". The documentation states, "The local-exec provisioner invokes a local executable after a resource is created. This invokes a process on the machine running Terraform, not on the resource."

2. HashiCorp Terraform Documentation, "Provisioners". The overview explains the difference between local and remote provisioners, clarifying that local-exec is for actions on the control machine.