Please choose the correct ending to complete the given sentence: Health: [header] How to prevent artery blockage [title] Do not smoke. [step] Smoking not only can clog your arteries, but it can cause lung diseases, such as lung cancer. Cigarettes are made out of more than 4 , 000 chemicals, that not only damage the heart and the lungs, but it can damage your body as a whole.

Ending1: If you live in a household that smokes, you will want to quit. [title] Decrease the amount of gas in your home. Ending2: [title] Maintain a proper cholesterol level. [step] Cholesterol is the most likely to block one's arteries. Ending3: Buy or smoke other smoke-harming substances and consider quitting altogether. [substeps] If a loved one doesn't smoke, stay away from it. Ending4: When you are quitting smoking, ask yourself if you don't mind nicotine withdrawal in the office. If nicotine can interfere with your body's ability to support proper blood flow, your body can't support it in the workplace.

Answer format: ending1/ending2/ending3/ending4