Question ID:PT70 S4 Q10 Passage:A recent study showed that people who address problems quickly and directly are significantly less likely to have gum disease than are people who react to problems by refusing to think about them. Since stress can have a negative effect on the immune system, the study's results clearly indicate that some forms of gum disease are caused or aggravated by suppression of the immune system. Stem:The argument requires the assumption that Correct Answer Choice:BChoice A:painful conditions will interfere with a person's ability to address problems quickly and directly Choice B:refusing to think about something troubling contributes to a person's level of stress Choice C:people who have highly stressful lives tend to address problems quickly and directly Choice D:people who tend to address problems quickly and directly will invariably seek dental care at the first sign of problems Choice E:the reason some people refuse to think about problems is that they find addressing problems to be stressful