Find the equations of any vertical asymptotes. x2 +9 f(x) = (x2 -81) (x2 - 36) Select the correct choice below and fill in any answer boxes to complete your choice. O A. There is one vertical asymptote. Its equation is O B. There are two vertical asymptotes. In order from left to right, their equations are and O C. .There are three vertical asymptotes. In order from left to right, their equations are and O D. There are four vertical asymptotes. In order from left to right, their equations are and O E. There are no vertical asymptotes