Give the equations of any vertical, horizontal, or oblique asymptotes for the graph of the rational function. f(x)= x-6x-7 2x-x-55 OA. There is one vertical asymptote. Its equation is (Type an equation. Use integers or fractions for any numbers in the equation.) B. There are two vertical asymptotes. The equation of the leftmost one is and the equation of the rightmost one is (Type equations. Use integers or fractions for any numbers in the equations.) OC. There are no vertical asymptotes. Identify the horizontal or oblique asymptote if one exists. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. The horizontal asymptote is (Type an equation. Use integers or fractions for any numbers in the equation.) OB. The oblique asymptote is (Type an equation in slope-intercept form. Use integers or fractions for any numbers in the equation.) OC. There is no horizontal asymptote. The domain of f is