若一株β-溶血性革蘭氏陽性球菌，catalase及PYR test均陰性，對bacitracin及Sulfamethoxazole-Trimethoprim均呈抵抗性，則其最可能為下列何種菌？
Streptococcus agalactiae
Streptococcus pyogenes
Streptococcus pneumoniae
Enterococcus faecalis
