\(y = \frac{{ \sqrt x }}{{x + 1}} \).
A.\(\frac{{1 - x}}{{\sqrt x {{\left( {x + 1} \right)}^2}}}\)
B.\(\frac{{x - 1}}{{2\sqrt x {{\left( {x + 1} \right)}^2}}}\)
C.\(\frac{{x - 1}}{{\sqrt x {{\left( {x + 1} \right)}^2}}}\)
D.\(\frac{{1 - x}}{{2\sqrt x {{\left( {x + 1} \right)}^2}}}\)