Automatic space reclamation for column-organized tables can be accomplished in which of the following scenarios?

Automatic space reclamation for column-organized tables can be accomplished in which of the following scenarios?
A . When the registry variableDB2_AUTORECLAIMSPACE=YES
B . After termination all the back-end processes using TERMINATE command
C . After setting the database configuration parameter AUTO_DEL_REC_OBJ to ON
D . When the registry variable DB2_WORKLOAD=ANALYTICS prior to database creation

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Answer: D