The student clearly stated an appropriate and specific research question regarding the role of the secret police in Salazar's regime, which is well-defined in terms of scope, covering the period from 1940 to 1974. The sources selected for the investigation are relevant and appropriate, providing valuable insights into the topic. The student effectively explained the relevance of these sources and their content, while also analyzing their values and limitations. However, the student did not categorize the sources as primary or secondary, which is a necessary element for a complete explanation of the nature of the sources. Overall, the student's work demonstrates a strong understanding of the investigation's topic and sources.
