The correct option is git reset HEAD~1. This command resets the last commit while keeping the changes in the working directory. The HEAD~1 refers to the commit before the last one.

In Git, a 'Three-way merge' is used to integrate changes from one branch into another, creating a new commit even if a fast-forward merge is possible. This merge strategy involves comparing the changes in three branches—the two branch tips and their common ancestor. It is particularly useful when there are conflicting changes on both branches.

The suitable option is Git Stash. It allows the developer to save changes in a stack, switch to another task, and then come back to the original changes without committing them.

Branching in Git is crucial for parallel development. It allows multiple developers to work on different features simultaneously, optimizing the CI/CD process by avoiding conflicts and enabling efficient collaboration.

In CI/CD, the final deployment is often done to the Production environment, ensuring that the changes are applied to the live system. This helps in delivering new features or bug fixes to end-users.

The git reflog command displays a log of changes to branch references, including commits that may not be part of the current branch. It's useful for recovering lost commits or undoing changes.

The Feature Branch Workflow was found to be key in managing large-scale projects efficiently. It involves creating separate branches for each feature, allowing parallel development without affecting the main codebase until features are thoroughly tested and ready for integration.

Git positively impacts continuous integration and continuous deployment in Agile teams by enabling faster integration and deployment pipelines, improving collaboration through parallel development, and ensuring better tracking of changes and versioning.

Git ensures data integrity in large repositories through automatic garbage collection. This process identifies and removes unnecessary or unreferenced objects, maintaining the integrity and efficiency of the repository over time.

The correct command is git checkout -b . This command creates a new branch and switches to it in one step, saving you from the need to create a branch and then switch to it separately.

The .gitattributes file is used to enforce code quality standards across all project contributors by specifying attributes for files in the repository. It helps in maintaining consistency and best practices.

The correct option is filter-branch. This Git command allows the modification of the repository's commit history, including the removal of sensitive or large files. It's crucial to be cautious when using this command as it can rewrite history, impacting collaborators.