Let the Eigenvector of the matrix \(\left[ {\begin{array}{*{20}{c}} 1&2\\ 0&2 \end{array}} \right]\) be written in the form \(\left[ {\begin{array}{*{20}{c}} 1\\ a \end{array}} \right]\) and \(\left[ {\begin{array}{*{20}{c}} 1\\ b \end{array}} \right]\). What is the value of (a + b)?

• A. 0
• B. \(\frac{1}{2}\)
• C. 1
• D. 2