导丝辊卡死的处理方法通常为（）。

A.清理缠丝

B.更换导丝辊

C.更换导丝辊外壳

D.继续使用

When lowering lifeboats in heavy seas，a good practice is to rig frapping lines（）.

A.on only the forward falls

B.on only the after falls

C.with a lead of about 45 degrees to the boat

D.from the falls to the main deck of the vessel