Identify which of the following rational functions has no vertical asymptotes.

• A. ƒ(x) = (5x - 6)/(x + 13)
• B. ƒ(x) = 7x/(x² - 25)
• C. ƒ(x) = (x² - 36)/(x + 6)
• D. ƒ(x) = (x+17)/(x+3)(x - 9)

Answer: (C)