Which of the following is the BEST example of structured data?

Organizing beverage preferences in a single text field makes the data difficult to query, sort, or analyze based on individual preferences, defining it as unstructured or semi-structured rather than fully structured.

Storing information in a flat file without distinct fields means the data lacks a defined structure for systematic organization and retrieval, making it unstructured.

Vendor order information stored in unnamed fields lacks a consistent, predefined schema that would allow for proper indexing, querying, and analysis, rendering it effectively unstructured for practical use.

Structured data is characterized by its organization in a fixed format, typically in rows and columns within a relational database, where each field has a defined purpose and data type. The ability to sort or group customer information by any field indicates that the data is well-defined into distinct categories (fields) and stored in a database or similar structure, which is the hallmark of structured data.