The student clearly stated an appropriate and specific question for the historical investigation, focusing on the comparison of the regimes of Adolf Hitler and Joseph Stalin. The research question is well-defined in terms of dates and significant historical figures, allowing for a thorough exploration of the topic. The student chose relevant sources, including works by Richard Overy and Timothy Snyder, and identified them as secondary sources, explaining their relevance and nature effectively. However, the student did not clearly explain the relevance of the sources in relation to the investigation's purpose. Overall, the student provided a precise analysis of the values and limitations of the sources, demonstrating a comprehensive understanding of their content and context.