Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to detect gum disease [title] Learn about the causes of gum disease. [step] The condition actually begins with the deposition of plaque (a slimy substance) around the teeth. Plaque is the media where the harmful bacteria thrive and form colonies.

Ending1: Both state and federal governments and dentists will determine which bacteria are causing the gum disease. Individuals with gum disease, first and foremost, should see their physician to determine for sure what certain bacteria is causing the gum disease. Ending2: This is why you should have at least three more years of poor dental health before getting diagnosed. If you know about the actual causes of the gum disease, you should be able to identify bacteria responsible for the disease and make a professional appointment to see the oral doctor. Ending3: These bacteria produce acids which not only damage the tooth enamel but also affect the gums. [substeps] Plaque is a transparent layer and hence sometimes goes unnoticed. Ending4: Plaque may appear white or light yellow when very early, but will generally dry up and dissolve after two days of usage. After six weeks, the plaque may start crawling, eventually over the surface of the teeth.

Answer format: ending1/ending2/ending3/ending4