In project control surveys for limited geographic coverage, which order levels are designated as primary, secondary, and tertiary?

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In project control surveys with limited geographic coverage, control is organized in three levels—primary, secondary, and tertiary—each tied to a specific order number in the DAO conventions. The established mapping is that secondary control corresponds to the Third order, primary control to the Fourth order, and tertiary control to the Fifth order. This arrangement reflects the intended hierarchy of accuracy and the role of each level: the primary network provides the main framework, secondary ties into and supports that framework, and tertiary handles local, smaller-scale work. The option that states secondary as Third and primary as Fourth (with tertiary as the next, i.e., Fifth) fits this DAO designation, making it the correct choice. The other options either swap the order numbers between primary and secondary, omit the tertiary level, or present an unrelated sequence.