Tìm nguyên hàm của \(f\left( x \right) = \sqrt {2x - 1} \)

A. \(\int {f\left( x \right){\rm{d}}x}  = \frac{2}{3}\left( {2x - 1} \right)\sqrt {2x - 1}  + C\)

B. \(\int {f\left( x \right){\rm{d}}x}  = \frac{1}{3}\left( {2x - 1} \right)\sqrt {2x - 1}  + C\)

C. \(\int {f\left( x \right){\rm{d}}x}  =  - \frac{1}{3}\sqrt {2x - 1}  + C\)

D. \(\int {f\left( x \right){\rm{d}}x}  = \frac{1}{2}\sqrt {2x - 1}  + C\)