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database distributed databases
1. Which of the following is true concerning a global transaction?
(A): The required data are at one local site and the distributed DBMS passes the request to only the local DBMS.
(B): The required data are at one local site and the distributed DBMS routes requests as necessary.
(C): The required data are located in at least one nonlocal site and the distributed DBMS passes the request to only the local DBMS.
(D): The required data are located in at least one nonlocal site and the distributed DBMS routes requests as necessary.
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