Which of the following scientific names is written correctly…

Which of the following scientific names is written correctly according to binomial nomenclature? A) Streptococcus Pyogenes B) Staphylococcus aureus C) Shigella flexneri or Shigella flexneri D) Pseudomonas aeruginosa or Pseudomonas aeruginosa E) Proteus mirabilis or Proteus mirabilis