Cultures Taken from an Impetigo Lesion Reveal Bacteria That Are

Cultures taken from an impetigo lesion reveal bacteria that are Gram- positive cocci which are catalase- and coagulase- negative and cause beta- hemolysis when cultured on blood agar. The responsible species is

A) Staphylococcus aureus.
B) Streptococcus pyogenes.
C) staphylococci species other than Staphylococcus aureus.
D) Pseudomonas aeruginosa.
E) Clostridium perfringens.