The lifeline which is part of a fireman's outfit must be __________.

Correct Answer: Option D — All of the above

Lifelines for fireman's outfits must be at least 50 feet long, corrosion-resistant, and constructed of steel or bronze wire rope. These specifications, mandated by 46 CFR, ensure the lifeline remains durable, flexible, and capable of withstanding the harsh marine environment and high-heat conditions encountered during shipboard firefighting.