The correct answer is A) all emergency signals. The muster list is a document that outlines the roles and responsibilities of each crew member during an emergency situation, such as vessel abandonment. It typically includes information on each crew member's muster station, their duties during the abandonment process, and basic instructions. In addition to this, the muster list must also include all emergency signals that may be used on the vessel, as this information is crucial for the crew to be aware of in order to respond appropriately during an emergency. The other options are incorrect because they do not align with the typical contents of a muster list. The work schedule (B) and the time for weekly drills (D) are not directly relevant to the information provided on the muster list. While instructions for lowering the survival craft (C) are important, this information is typically covered under the "duties during abandonment" section of the muster list, rather than as a separate item.