单项选择题
For a sacrifice or expenditure to be the subject of general average contribution，there must be a danger common to（）.
A.the cargo owners B.the shipowners C.the whole adventure D.the whole voyage
单项选择题 Deviation to save（）is always justified，unless it is expressly stipulated otherwise.
单项选择题 Deviation is caused by（）.
单项选择题 Deviation changes with a change in（）.
