Residue at z = 2 of \(f\left( z \right) = \frac{{2z + 1}}{{{z^2} - z - 2}}\) is

• A. \(\frac{{5}}{{3}}\)
• B. \(\frac{{1}}{{3}}\)
• C. \(\frac{{3}}{{5}}\)
• D. \(\frac{{2}}{{3}}\)