单项选择题 If the Shipowner relies on an excepted peril，he must（）that the loss or damage was caused thereby.

单项选择题 If the Shipowner has agreed to receive deck cargo，（）must contribute to the loss，provided the owner of the jettisoned goods is the sole cargo owner.

单项选择题 If the Shipowner can only show that some part of the damage to the goods was due to a cause within the exception，he must also show how much of the damage is comprised in that part，otherwise he is liable（）.