Recent dental research shows that bacteria around the gum line produces a substance that in sufficient amounts can induce preterm labor in pregnant women and can cause heart disease by clogging arteries. both medical outcomes add to payouts by health insurers to medical-service providers. the bacteria is best removed by a dentist or trained hygienist during a routine cleaning. one health insurer has calculated that it can reduce its payouts by reimbursing subscribers who are either pregnant or at high risk of developing heart disease for the cost of one professional dental cleaning per year. which of the following, if true, most stongly supports the assertion that the insurer's payouts to medical-service providers will decrease if it implements the reimbursement plan described above?