Please Read the Clinical Scenario, and Then Answer the Question

Please read the clinical scenario, and then answer the question that follow to become familiar with the traditional NCLEX question format.
As an RN in a primary care office, you recently took care of a 15-year-old patient with severe gastrointestinal distress. Since the patient had experienced diarrhea, vomiting, and a fever for 4 days, a stool culture was ordered in an attempt to identify a disease-causing pathogen. The laboratory results have just been faxed over to your office and you begin to read the data.
-The report concludes that the diagnosis is salmonellosis due to Salmonella infection.Remembering resources available for prokaryotic identification,you assume that the laboratory technicians may have used

A) Bergey's Manual of Systematic Bacteriology because rRNA analysis was required in the identification of this pathogen.
B) Bergey's Manual of Systematic Bacteriology because its five volumes of information were necessary to create a phylogenetic tree for identification of this pathogen.
C) Bergey's Manual of Determinative Bacteriology because they needed to fully understand the evolutionary background of the pathogen.
D) Bergey's Manual of Determinative Bacteriology because it classifies prokaryotes on phenotypic traits typically tested for in clinical settings.