单项选择题
A.is always effective immediately
B.includes a statement of each condition requiring corrective action
C.must be in writing before it takes effect
D.All of the above
单项选择题 The object of the both-to-blame collision clause is（）.
单项选择题 The merchant undertakes that no claim or allegation shall be made against any servant，agent or subcontractor of the carrier which（）to impose upon any of them or any liability whatsoever in connection with the goods.
单项选择题 The merchant shall have the goods properly（）and accurately and clearly（）before shipment.