c. The zeros of the denominator of f are minus3 and 4, so f has vertical asymptotes at these points. Choose the correct answer below. A. True. Vertical asymptotes require examining limits of the denominator as xright arrowplus or minusinfinity. B. False. Vertical asymptotes require examining limits as xright arrow plus or minus infinity. C. True. Vertical asymptotes occur where zeros of the denominator happen. D. False. These points are only candidates for vertical asymptotes. Consider, for example, the function f(x)equals StartFraction x squared minus 9 Over x squared minus x minus 12 EndFraction .