For a long-term project with potential for significant budgeting and tracking overhead, the Scrum Master should set up a long-standing team. According to the Disciplined Agile framework, long-standing teams are stable teams that remain intact across multiple projects or over a long duration. These teams are cross- functional, meaning they have all the necessary skills to deliver value and are more likely to develop high levels of collaboration and productivity over time. While cross-functional teams (B) are a necessary characteristic, "long-standing team" (A) is the best answer for a long-term project with significant overhead, as it implies continuity and sustained team dynamics. A project team (C) is typically formed for a short-term, specific project and disbanded afterward. A shared services team (D) provides specialized skills and services to various teams and is not typically suited for the dedicated effort required by long-term projects.