Final answer:
Janet Spector's archaeological work was unusual because it involved collaboration between Dakota and non-Dakota in various cultural and scientific aspects of the dig, representing a shift towards a more inclusive and respectful approach in archaeology.
Step-by-step explanation:
Janet Spector's archaeological work was unusual because B) Dakota and non-Dakota were collaborating in teaching Dakota language, oral history, ethnobotany, ecology, and history at the site while digging continued. This collaborative approach in her archaeological work emphasized a fusion of cultural knowledge with scientific inquiry, aligning with contemporary methods that seek to respect and integrate the perspectives and sovereignty of Indigenous communities in the study and interpretation of their own heritage. Such an approach was a departure from traditional archaeological practices and played a part in the broader movement of decolonizing anthropology.