What is the correct sequence when writing the scientific name of an organism?

• A
  Author $\rightarrow$ Subspecies $\rightarrow$ Species $\rightarrow$ Genus
• B
  Author $\rightarrow$ Common name $\rightarrow$ Genus $\rightarrow$ Species
• C
  Genus $\rightarrow$ Species $\rightarrow$ Author $\rightarrow$ Common name
• D
  Genus $\rightarrow$ Species $\rightarrow$ Author