安装工程险的保险金额是按（）确定。

Your vessel is damaged and listing to port. There is a short rolling period around the angle of list. The portside freeboard is reduced to 1 foot. There is no trim and the weather is calm. You should FIRST（）.

A.press up a slack double bottom tank on the port side

B.fill an empty centerline double bottom tank

C.pump out a slack marine portable tank located on the portside amidships

D.jettison the anchors and anchor cables