Final answer:
The inspiration toward a literary culture for the Aggresse Eite could be best matched with cultural exchange, as similar historical shifts were driven by a blend of economic, cultural, and religious motives.
Step-by-step explanation:
The primary reason why the Aggresse Eite were inspired to become a more literary culture is not directly provided in the historical contexts given. However, drawing parallels from similar historical motivations, cultural shifts such as those seen in the Mississippian tradition or during periods of imperialism often stem from a combination of economic, political, cultural, and religious factors. In the case of the Mississippian tradition, a major reason for cultural shift was the adoption of maize agriculture. Meanwhile, a primary motive for 19th-century imperialism was gaining access to raw materials, which is both an economic and cultural driver. Similarly, the exploration endeavors of Portugal, Spain, and China during different centuries were heavily influenced by economic prosperity, cultural exchange, military conquest, and religious beliefs. Considering this context, the most fitting answer, which encompasses these elements, would be 'b) Cultural exchange'.