12. I belive I am correct is this true?

Determine the vertical asymptote(s) of the function. If none exists, state that fact. 7x - 9 f(x) = x - 9 Select the correct choice below and, if necessary, fill in the answer box(es) to complete your choice. O A. The function has one vertical asymptote, (Type an equation.) O B. The function has two vertical asymptotes. The leftmost asymptote is and the rightmost asymptote is (Type equations.) C. The function has three vertical asymptotes. The leftmost asymptote is 9, the middle asymptote is 0, and the rightmost asymptote is 7 (Type equations.) O D. The function has no vertical asymptotes