jayne has asked her domino server administrator to enable doc locking on the server. which one of the following must she do to enable it for her application?（）

• A、 enable the “allow doc locking “ db property 
• B、 create a view column for the locked doc view icon 
• C、 add a profile doc to the db to manage the locked doc 
• D、 enable doc locking at the view level for each view in the db