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