A very frightened parent brings her young child into the ER. The mother tells the nurse that the other day, the boy was playing near an old junkyard and climbed the fence, injuring his foot on a loose piece of chain link. The mother cleaned and wrapped the cut, but now the boy had a high fever, and is rapidly losing muscle function. A blood culture was taken and demonstrated the following organisms (pic -- not included here...). What is your diagnosis?

A) Streptococcus pyogenes
B) Clostridium tetani
C) Staphylococcus aureus
D) Escherichia coli