Which of the following refers to information about project progress?

The phrase "work performance data" specifically indicates metrics and information gathered during project execution that reflect the actual progress of the project. This includes data on project activities, deliverables, and schedules, allowing project managers to assess whether the project is on track and meeting its objectives.

Work performance data is crucial in understanding various aspects of a project's health, as it encompasses quantitative progress measurements and other relevant performance indicators. This data is later analyzed and transformed into work performance information, which provides deeper insights regarding overall project performance.

In contrast, the other options do not focus solely on project progress. For example, a project status report contains work performance data but also includes a narrative on the project’s overall situation, including risks, issues, and forecasts. A change log tracks changes to the project but does not inherently provide information about progress. An activity list outlines the tasks to be completed but does not convey their completion status or progress toward project goals. Thus, work performance data is the most direct and relevant concept related to information about project progress.