Which of the following best describes a township's structure?

The correct choice is based on the standardized method of land surveying used in the United States, particularly through the Public Land Survey System (PLSS). A township is defined as a rectangular area that measures 6 miles on each side, resulting in a total area of 36 square miles. This area is further subdivided into 36 sections, each measuring 1 mile by 1 mile or 640 acres.

This definition is crucial as it provides a consistent framework for land division and property assessment across various jurisdictions. The structure facilitates the organization of land for sale, surveying, and taxation purposes. By understanding the township's structure as a 6-mile square containing 36 sections, appraisers and assessors can accurately map, assess, and value real estate within that area, which is essential for the assessment process.

Other choices do not reflect the accurate measurement and structure of a township according to established surveying principles. Thus, choice C succinctly captures the standard definition and serves as a fundamental concept for those in the field of assessment.