Final answer:
Database users can connect to a database management system (DBMS) as a database designer, database administrator, or database end-user. Therefore, the correct answer is 'a. All of the others'.
Step-by-step explanation:
Database users can connect to a database management system (DBMS) in multiple roles. The roles include:
- Database designer: Responsible for designing the database structure.
- Database administrator: Manages and maintains the database system, ensuring its availability, security, and performance.
- Database end-user: They interact with the database through applications to perform tasks such as data entry, updates, and queries.
Therefore, the correct answer to the question is a. All of the others. This answer comprises the different types of users who can connect to a database management system, each with their specific roles and responsibilities within the system.