The student included five supporting documents that cover various aspects of Redbull's marketing strategies, demonstrating a comprehensive understanding of the topic. All documents are contemporary, published within three years prior to the submission, and are clearly labeled. The documents are relevant and provide in-depth analysis, presenting multiple perspectives on Redbull's marketing approaches. However, the student did not highlight the parts of each supporting document that relate directly to the IA, nor did they assess the validity and reliability of the sources, which were areas for improvement.