Which group of individuals is classified as apparently healthy?

The classification of individuals as "apparently healthy" primarily hinges on their symptomatic status and the presence of risk factors. Those who are asymptomatic and have no more than one primary coronary risk factor fit this classification because they do not demonstrate clinical signs or symptoms of cardiovascular disease and possess only a minimal amount of risk. This means they are not currently experiencing any adverse symptoms related to cardiopulmonary health, making them more likely to be considered healthy compared to those with multiple risk factors, known diseases, or manifesting symptoms.

In contrast, individuals with multiple primary coronary risk factors, known cardiac disease, or signs of cardiopulmonary disease are actively showing indications of health concerns, which disqualifies them from being classified as apparently healthy. The presence of symptoms or multiple risk factors typically indicates a higher likelihood of cardiovascular issues, making those individuals less healthy overall. Thus, option D accurately identifies the group that meets the criteria for being classified as apparently healthy.