\(\int \frac{dx}{(x^2-9)}\) equals ______

• A. \(\frac{1}{6} log \frac{x+3}{x-3}\) + C
• B. \(\frac{1}{6} log \frac{x-3}{x+3}\) + C
• C. \(\frac{1}{5} log \frac{x+3}{x-3}\) + C
• D. \(\frac{1}{3} log \frac{x+3}{x-3}\) + C