If \(x = \frac{{4\sqrt {ab} }}{{\sqrt a + \sqrt b }}\), then what is the value of \(\frac{{x + 2\sqrt a }}{{x - 2\sqrt a }} + \frac{{x + 2\sqrt b }}{{x - 2\sqrt b }}\) (when a ≠ b) ?

• A. 0
• B. 2
• C. 4
• D. \(\frac{{\sqrt a + \sqrt b }}{{\sqrt a - \sqrt b }}\)