Which of the following attributes could you use a Bucket Group for?

Using a Bucket Group for an attribute like Cost is appropriate because Bucket Groups allow you to categorize continuous or quantitative data into defined ranges or "buckets." This functionality is particularly useful for managing financial data like costs, where you might want to analyze expenses in various ranges, such as low, medium, and high costs. This categorization enables easier visualization and interpretation of financial data, helping stakeholders make informed decisions based on summarized cost ranges.

In contrast, other attributes such as Urgency Level, Team Size, and Completion Status are typically categorical or qualitative rather than quantitative. While these attributes may have their own form of categorization, they do not lend themselves as neatly to the concept of 'buckets' that represent ranges of values, as seen with Cost.