单项选择题 The basic shipping paper that forms an agreement between a shipowner and a charterer is a （）.

单项选择题 That the Shipowner has broken a condition precedent will（）the Charterer from the liability to provide a cargo.

单项选择题 Sometimes the charter-party states that the amount of cargo to be loaded is to be decided by the shipowners，e.g. 10000 tons of 2240 1b.，12％ more or less at（）option.