The student included three to five supporting documents, specifically four, from credible sources like BBC and CNBC, which provide a comprehensive analysis of Netflix's subscription offerings. These documents are contemporary, published within the last three years, and are clearly labeled for easy reference. The student successfully incorporated a variety of relevant and in-depth materials, presenting a range of ideas and views on the topic, including insights into the impact of Netflix's ad-supported plan. However, the student did not include an assessment of the validity and reliability of the supporting documents, which could have enhanced the depth of the analysis.