One or more characters used to identify a data field in a computer program isOptionsFile nameLabelGroupDatabase

The correct term from the options provided is Label.

Explanation:

In computer programming and data management, a Label is a character or set of characters that identifies a data field. This term is used to denote names assigned to data elements to enhance clarity and organization within the program.

• File name refers to the name assigned to a file in a file system rather than to a field within a database or code structure.
• Group typically refers to a collection of items or a category, not specifically an identifier for a data field.
• Database is a larger structure used to store, organize, and manage data but does not refer to individual field identifiers.

Using meaningful labels is crucial as they provide a clear way to reference data fields, make code more readable, and improve the maintainability of the program. Labels help programmers understand the purpose and type of information being dealt with in the data processing pipeline.