Final answer:
The Team Backlog maintains User Stories and Enabler Stories, which are essential for Agile software development and continuous improvement within SAFe.
Step-by-step explanation:
The two types of items that are maintained in the Team Backlog are a) User Stories and d) Enabler Stories. User Stories are small, actionable work items that feature descriptions from the user's perspective on what they need and why. Enabler Stories refer to activities that support the development of customer features, such as architectural changes, design activities, or research tasks. These items are essential for the smooth operation and continuous improvement in Agile software development practices, particularly within the Scaled Agile Framework (SAFe).