Answer:
the blood test
Explanation:
The systemic lupus erythematosus, is a sickness that is quite difficult to detect, is a mixture of the observations by the doctor, the inconvenience mention by the client and the blood analysis because there need to be a depletion in leukocytes, lymphocytes and platelets. Also the client need to present purple color in feet and hands, some fever, muscular pain, among other symptoms.