Review this SQL from a Web GUI tool:
update alerts.status set OwnerUID=%uid, Acknowledged=0 where Serial in ($selected_rows.Serial);
This SQL tool changes the OwnerUID on the selected events to which option?

A.
to the userid of the user running the tool and acknowledges

B.
to the userid of the user running the tool and deacknowledges

C.
to the username of the user running the tool and acknowledges

D.
to the username of the user running the tool and deacknowledges