Which characteristic best describes a Relational Database Management System (RDBMS)?

A Relational Database Management System (RDBMS) is characterized by the way it structures data, specifically through the use of tables, which are also referred to as relations. Each table consists of rows and columns, allowing data to be organized logically and enabling relationships to be created between different tables. This structured format facilitates easier data retrieval, management, and manipulation through the use of SQL (Structured Query Language).

The use of tables ensures that the data adheres to certain constraints and relationships defined within the schema, which promotes data integrity and reduces redundancy. This characteristic is fundamental to relational databases and distinguishes them from other types of database systems that may not organize data in a structured way. The ability to handle relationships between data entities is central to the functionality of an RDBMS, making option B the defining characteristic.