Final answer:
Paragraphs 9-10 likely contribute to the historical context of the struggle for African-American equality by emphasizing the poor treatment Jesse Owens received, highlighting persisting racial prejudices despite his status as an Olympic winner.
Step-by-step explanation:
Based on the provided information, paragraphs 9-10 are not explicitly shown, but we can infer they relate to a historical context, likely discussing African-American achievements and the challenges they faced during a time of segregation. If they discuss the athlete Jesse Owens and his treatment as an Olympic winner, it is plausible that they contribute to the development of ideas in the text by emphasizing the racial prejudices present during the era, and how they affected even the most accomplished individuals such as Owens. Therefore, option C, stating that these paragraphs 'They emphasize how poorly Jesse Owens was treated, even as an Olympic winner,' seems most consistent with the broader theme of the text about the African-American struggle for equality and recognition of achievements.