Please choose the correct ending to complete the given sentence: Health: [header] How to prevent lung cancer [title] Stop smoking tobacco products. [step] Cigarette and tobacco smoke contains harmful substances known as carcinogens that can damage the cells lining your lungs. Over time, smoking can lead to the development and multiplication of abnormal cells and increase your risk for lung cancer.

Ending1: [substeps] Smoking many of these products not only has been linked to the development of medical conditions like heart problems, gout, or osteoporosis, it also increases the risk of lung cancer. In addition, nicotine inhalation reduces the natural oxygen in your body. Ending2: The same does not mean you have to quit. [substeps] Cigarettes are no longer safe for smokers. Ending3: Quitting smoking can also help you maintain a healthy weight and reduce your risk of lung cancer by helping your body to expel carcinogens that are present in cigarette and tobacco products. [substeps] Quit smoking for a few days at a time. Ending4: [substeps] Contact your healthcare provider for help with smoking cessation programs if you experience difficulty with quitting smoking. Your physician may prescribe medications that can help you quit smoking, suggest that you join a smoking cessation support group, or recommend nicotine patches and gums that can help you kick your habit.

Answer format: ending1/ending2/ending3/ending4