Which GitLab feature is most effective for facilitating Scrum methodologies, specifically for managing sprints within a project?

In the GitLab Plan stage, what feature is specifically designed to manage and visualize the dependencies between issues within a project?

You are managing a large project in GitLab involving multiple teams: Development, Testing, and Deployment. You need to configure the project's structure to optimize access control, issue tracking, and efficient use of CI/CD pipelines across these teams. You decide to utilize GitLab Groups. Which of the following configurations best utilizes GitLab Groups to meet these requirements?

When managing a software development project using GitLab with the Waterfall methodology, which feature should primarily be utilized to ensure that each phase of development is completed before the next one begins?

What is the primary purpose of using Epics in the GitLab Plan stage?