Answer:
B: The diagnosis won't be based on the findings of a single test but by combining all data found.
Explanation:
The way to diagnose Systemic Lupus Erythematosus (SLE) is to use the results of multiple tests, namely the physical assessment and laboratory results. The reason for this is because there is not a test that can be used to test for this diagnosis by itself.
The other options do not answer the patients question.