All pavement up to within ______ of the unfinished edges should have the joints full and be compacted by the end of each day.

The correct answer indicates that all pavement should have the joints full and be compacted up to within 6 feet of the unfinished edges by the end of each day. This requirement ensures that the integrity and stability of the pavement are maintained during the construction process. Compaction is crucial for preventing future settlement, cracking, and other structural issues that can arise if the pavement is not adequately supported at the edges.

Maintaining a distance of 6 feet from the edges allows for a practical zone around the unfinished area, where work can be completed without compromising the adjacent pavement. This practice is essential to ensure that any potential movement or displacement of the material is minimized, and it promotes a better finish.

In the context of the other options, a smaller distance from the edges, such as 3, 4, or 5 feet, could potentially leave a larger unsupported area, increasing the risk for issues in the pavement's performance. This highlights the importance of adhering to best practices for joint filling and compaction in landscape paving projects.