Main steam and exhaust pipes for winches and similar gear shall not pass through crew acco

Main steam and exhaust pipes for winches and similar gear shall not pass through crew accommodation nor, whenever technically possible, through alleyways leading to crew accommodation; where they do pass through such alleyways, they shall be adequately .

A.ventilated and tagged

B.ventilated and cooled down

C.insulated and encased

D.insulated and warmed up

请帮忙给出正确答案和分析，谢谢！