문맥상 밑줄 친 부분에 들어갈 말로 가장 적절한 것은? Dentists offer a number of reasons so many preschoolers suffer from extensive dental decay. Though they are not necessarily new, they have combined to create a growing problem: sweet drinks at bedtime, parents who choose bottled water rather than fluoridated tap water for their children, and a lack of awareness that infants should, according to pediatric experts, visit a dentist by age 1 to be assessed for future cavity risk, even though they may _________________________________.