GitHub Copilot in the CLI provides the gh copilot config command to manage its behavior. This command allows users to configure two specific settings. The first is whether to opt-in or opt-out of usage analytics, which helps GitHub improve the product. The second is the default confirmation behavior for command execution; users can set it to always require confirmation before running a suggested command (--confirm) or to execute it immediately (--no-confirm). These settings tailor the tool's interactivity and data sharing preferences to the user's needs.

C. The default editor: This is a general setting for the main GitHub CLI (gh), not a specific configuration for the GitHub Copilot extension itself.

D. GitHub CLI subcommands: Subcommands are built-in functionalities of the tool (e.g., suggest, explain). They are not user-configurable settings.

1. GitHub Docs. (n.d.). Using GitHub Copilot in the CLI. GitHub. Retrieved from https://docs.github.com/en/copilot/github-copilot-in-the-cli/using-github-copilot-in-the-cli#configuring-github-copilot-in-the-cli

Reference Details: In the section "Configuring GitHub Copilot in the CLI," the documentation explicitly states: "You can configure the behavior of GitHub Copilot in the CLI using the gh copilot config command." It then details the two configurable settings: "Whether to opt-in to usage analytics" (using --enable-analytics or --disable-analytics) and "Whether Copilot in the CLI should ask for confirmation before executing a command" (using --confirm or --no-confirm).