The correct option is Open a pull request from her feature branch so teammates can review discuss and request changes before merging into the default branch.

This workflow creates a focused place for discussion and code review and it enables required approvals and automated checks to run before any merge. It keeps an auditable record of what was proposed and why and it lets the team choose how to merge so they can squash or rebase or create a merge commit. When the changes are combined into the default branch the team benefits from verified status checks and documented approvals which reduces risk and preserves a clear history.

Create a new independent repository for her feature so each teammate has a separate copy is wrong because splitting work into separate repositories fragments history and makes collaboration and review harder. A feature branch in the same repository is the standard collaborative approach.

Force push the branch directly to the default branch to skip any review is unsafe because it bypasses review and automated checks and can rewrite history. Many teams protect the default branch to prevent this.

Move the branch to Cloud Source Repositories to enable automatic merge without human approval is incorrect because it is not a GitHub workflow and automatic merging without human approval is not a safe practice. Cloud Source Repositories has been shut down which makes this option even less plausible on current exams.

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