After Examining a Patient and Reviewing the Results of His

After examining a patient and reviewing the results of his blood tests,a physician tells the patient that his mild depressive symptoms are not the result of a serious health problem.The physician suggests that the patient should try regular exercise and take the dietary supplement St.John's wort for 3 months.After this period,the physician will prescribe antidepressant medication,if the patient does not feel emotionally better.This advice is ________.

A) unreliable because the physician is not considering alternative methods of treating the patient's mental illness
B) an indication that the physician practices integrative medicine
C) typical for a conventional medical practitioner
D) quackery and medically irresponsible