The conclusion that can be drawn about the level of economic development in countries with different specializations in a commodity chain is: Quaternary sector specializations would earn the highest wages.
This is because the quaternary sector, which includes knowledge-based activities such as research and development, information technology, and education, typically offers higher value-added services compared to the primary sector (extraction of raw materials), secondary sector (manufacturing), and tertiary sector (services). Countries that specialize in the quaternary sector often exhibit higher levels of economic development and innovation.