The correct answer is C) The manifest must be kept in a designated holder on or near the bridge. This is correct because the dangerous cargo manifest, which lists the hazardous materials carried on a ship, must be kept in a designated holder on or near the bridge for easy access and reference by the crew. This requirement is specified in the regulations governing the transportation of dangerous goods by sea. The other answer choices are incorrect - A) is incorrect because the manifest does not need to specify the type of label required for each cargo, B) is incorrect because the manifest must be prepared by the master or other designated ship's officer, and D) is incorrect because hazardous and non-hazardous cargo must be listed separately on the manifest.