input: Text: Defining Decay Down If you haven't visited a dentist in the past few years, first of all, that's gross. (Checkups are every six months, and don't pretend you forgot.) Second, be grateful that you have avoided the "intra-oral camera." As the dentist (or assistant) navigates this horrifying little gadget through the graveyard of your mouth, a color television magnifies the florid pustulance of your gums and the puke-yellow dinge of your smile. A harmless crevice in your silver-mercury amalgam filling looks like Hell's Canyon. The microcracks in your enamel look like a broken window. All this can be fixed, of course, with 10 grand of straightening, filling, sealing, and whitening. "You will agree to anything the second they put that thing in your mouth," says one recent victim of the camera. "You can't believe you are walking around with that, that, that ick in your mouth." The transformation of American dentistry from drill-and-fill to shoot-and-loot is an unlikely business success story of the '90s, a case study in how a profession can work itself out of a job and still prosper. Dentists, after all, are supposed to be extinct by now. While they happily (and profitably) scraped teeth and filled cavities during the '60s and '70s, fluoride was quietly choking off their revenue stream. The percentage of children with cavities fell by half and kept falling. People stopped going to the dentist, because they didn't need to. At the same time, the government funded dental-school construction, spilling new dentists into a saturated market. Many found themselves cleaning teeth for $10 an hour in mall clinics. In 1984, Forbes magazine forecast the end of the profession. Only a few lonely dentists would survive to fill the few remaining cavities, the last vestiges of a once-great civilization on Long Island. Instead, the number of dentists has jumped 20 percent,
  Question: Which of the following is a real danger to one's health from improper mouth care?
  
   (A) Heart disease
   (B) Yellow teeth
   (C) Halitosis
   (D) Crooked smile
  Answer:
output: Heart disease