Choice "D" is correct. A primary function of a database management system is to provide the capability to create and modify the database.Choice "b" is incorrect. A function of a database management system could be report customization if the database management system has an attached report writer. That function is not, however, primary.Choice "a" is incorrect. A function of a database management system would seldom be financial transaction (or any other type of transaction) input. Transaction input and processing would be provided by an application system using the database management system to store the application data.Choice "c" is incorrect. A function of many database management systems is to authorize database access. Many database management systems have security systems built in. This answer is close, but choice "D" is better.