As relates to maximal and submaximal exercise tests, under which circumstances would a doctor-supervised version be recommended by the American College of Sports Medicine?
                            
                         
                        
                            
                        
                             
                            
                            
                            
                                Explanation
                            
                                
                                    Answer: D - Any individual who is symptomatic or who has known cardiac, pulmonary or metabolic disease should be medically-supervised for an exercise test, whether the test is maximal or submaximal. Submaximal tests are much less taxing and the supervision of a physician may not be necessary if the person is asymptomatic and/or has no known disease, even if he or she has 2 or more risk factors. In contrast, this same person, wishing to undergo maximal testing, should always be medically supervised.