单项选择题

An administrator wants to delete an account object using the Database Cleanup utility. Which of the following is the correct syntax to perform this task？（）

A.dbclean -object account -type obsolete -db dbname -days daysold
B.dbclean -table account -type obsolete -db dbname -days daysold
C.dbclean -object organization -type account -db dbname -days daysold
D.dbclean -object user -type account -db dbname -days daysold

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