Your vessel is damaged，listing to port and on occasion flopping to the same angle to starboard. It has a long，slow，sluggish roll around the angle of list. There is excessive trim by the stern with little freeboard aft. What action should you take?（）.
A.Jettison any off-center topside weights to lower GM and correct the list
B.Pump out any slack after double-bottom tanks to reduce free surface and increase freeboard aft
C.Pump out the after peak and fill the forepeak to change the trim
D.Press up any slack double-bottom tanks forward of the tipping center，then fill the forepeak if empty
