A \(= \frac{{x - 1}}{{x + 1}}\), then the value of A - 1/A is:

• A. \(\frac{{ - 4(2x - 1)}}{{{x^2} - 1}}\)
• B. \(\frac{{{x^2} - 1}}{{ - 4(2x - 1)}}\)
• C. \(\frac{{{x^2} - 1}}{{ - 4(2x + 1)}}\)
• D. \(\frac{{ - 4x}}{{{x^2} - 1}}\)