question: Q:A sexually active 20-year-old woman has had fever, chills, malaise, and pain of the vulva for 2 days. Examination shows a vulvar pustule that has ulcerated and formed multiple satellite lesions. Nodes are palpated in the inguinal and femoral areas. A smear of fluid from the lesions establishes the diagnosis. Which of the following is the most likely causal organism?? 
  A:Chlamydia trachomatis;B:Haemophilus ducreyi;C:Neisseria gonorrhoeae;D:Streptococcus pyogenes (group A)