A small puncture wound on a woman's arm has become swollen, hot to the touch, and intensely painful. There is tissue necrosis but it is not "gassy," and under the microscope Gram-positive cocci in chains are present. Which of the following microbes is likely to be responsible?
A) Streptococcus pyogenes B) Staphylococcus aureus C) Pseudomonas aeruginosa D) Clostridium perfringens E) Sporothrix schenckii