Please choose the correct ending to complete the given sentence: Health: [header] How to treat bronchitis naturally [title] Distinguish between chronic and acute bronchitis. [step] Bronchitis is the result of inflammation of the air passages in the lungs and can be acute or chronic. Knowing the difference between acute and chronic bronchitis is important as the two conditions require different treatment.

Ending1: First, people with chronic bronchitis may experience bronchitis in a variety of different ways. [substeps] Acute bronchitis occurs when the lining of the lungs is not close to its normal resting point. Ending2: [substeps] Acute bronchitis is usually due to a viral infection and symptoms should not last more than seven to 10 days. This is the type of bronchitis that can be treated naturally as it usually does not require prescription medication. Ending3: [substeps] Chronic bronchitis by itself usually becomes extremely hard to treat. Symptoms of chronic bronchitis include severe sensitivity of the nasal passages and loud, stern face. Ending4: [substeps] Acute bronchitis is when the air ducts are torn in the lungs. This is caused by poor blood supply to the gut which causes your intestinal passage to become clogged.

Answer format: ending1/ending2/ending3/ending4