In order to be ACID-compliant, a database system must allow only one user connection at any given point in time. True False Which of the following best describes the "Durability" requirement of database transactions. Multiple users of a database cannot interfere with one another, since they are separated by sturdy virtual walls. If one or more rows within table A are referenced by a foreign key in table B, the DBMS will not allow a user to drop table A. Table A is considered "durable" until all foreign key references are removed. Once a transaction has been committed, it will remain committed. The precedence graph has no cycles