Final answer:
Tecumseh argued that Indian land should not be ceded to whites unless all Indian tribes agreed, emerging as a unifying force against American expansion and cultural imposition. The correct answer is option c.
Step-by-step explanation:
Tecumseh, a Shawnee war chief, argued that no single Indian tribe had the authority to cede land to white settlers, stating that land could not be sold unless all Indian tribes agreed to the sale. Tecumseh's view emerged in the context of widespread native opposition to land cessions, particularly in reaction to the actions of the governor of the Indiana Territory, William Henry Harrison, who successfully negotiated land sales by securing the agreement of several tribes. Tecumseh's stance was part of a broader movement among various Indian tribes, epitomized by his brother Tenskwatawa, the Prophet, who advocated for the rejection of Anglo-American culture, resistance to white expansion, and a return to traditional native ways.