4． Women would double their risk of suffering fromlung cancer if they were exposed to 40 or more years ofhousehold tobacco smoke.A. 妇女在家里吸烟长达 410 年或更长时间，她们患肺癌的痛苦就会加倍。B. 家庭妇女接触油烟，她们患肺癌的痛苦就会加倍。C. 妇女在家里吸烟的时间，她们患肺癌的危险就会加倍。D. 妇女在吸烟的家庭环境中生活 40 年或更长时间，她们患肺癌的风险就会加倍。