单项选择题 The Shipowner may do what is reasonable（）any of these liens in view of the fact that they are possessory liens，i.e. they can only be enforced by retaining actual or constructive possession of the cargo.

单项选择题 The Shipowner is under a duty to（）the vessel to the port of loading even though it is impossible for her to get there by the canceling date．

单项选择题 The Shipowner is not（）by the fact that a remote cause of the loss was an excepted peril.