Question: As regards a database management system ( DBMS ) , what is managed concurrency? A A system that accurately joins relations, making B A system

As regards a database management system (DBMS), what is managed concurrency?
A A system that accurately joins relations, making
B A system that allows multiple tables to be opened at the same time
A system that automatically updates currency exchange rates for data, as long as the correct data type is used
D A system that controls how multiple users can access data at the same time
As regards a database management system (DBMS), what is managed concurrency?

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