Which of the Following Is the Correct Way to Write $\it Canis$

Which of the following is the correct way to write the scientific name of the wolf?

A) canis lupus
B) $\it Canis$ $\it\ lupus$
C) $\it canis$ $\it Lupus$
D) $\it Canis$ $\it Lupus$
E) Canis lupus