\(\int {\frac{1}{{x\left( {x - 3} \right)}}dx} \) là

A. \(\frac{1}{3}\ln \left| {\frac{x}{{x + 3}}} \right| + C\)

B. \(\frac{1}{3}\ln \left| {\frac{{x - 3}}{x}} \right| + C\)

C. \(\frac{1}{3}\ln \left| {\frac{{x + 3}}{x}} \right| + C\)

D. \(\frac{1}{3}\ln \left| {\frac{x}{{x - 3}}} \right| + C\)