Final answer:
The digitized Oxford English Dictionary uses tags to structure its contents, which allow for consistent organization and information retrieval. The correct option is D.
Step-by-step explanation:
The structure of the digitized Oxford English Dictionary was helped by using tags. During the digitization process of the Oxford English Dictionary, elements like definitions, etymologies, and usage examples were encoded with specific textual markers or tags, which are a core component of markup languages such as SGML (Standard Generalized Markup Language) from which later HTML and XML arose.
These tags facilitated the organization and retrieval of information consistently and systematically, which is crucial for such a comprehensive and detailed resource. It's important to understand concepts like tagging because they are fundamental to the way electronic texts are formatted and managed.