The student clearly stated an appropriate and specific research question regarding the Soviet Union's impact on the Iran-Iraq War, which allowed for a detailed investigation. However, the question lacked a defined scope in terms of dates, which is essential for contextualizing the investigation. The student chose relevant sources and explained their significance effectively, but did not categorize these sources as primary or secondary, which would have clarified their nature. While the student provided a strong analysis of the origins of the sources, they failed to analyze the purpose and content effectively, lacking a structured evaluation of their values and limitations.