For the matrix A=(2102)A = \begin{pmatrix} 2 & 1 \\ 0 & 2 \end{pmatrix}A=(2012), what is the Jordan form?
(2102)\begin{pmatrix} 2 & 1 \\ 0 & 2 \end{pmatrix}(2012)
(2002)\begin{pmatrix} 2 & 0 \\ 0 & 2 \end{pmatrix}(2002)
(1002)\begin{pmatrix} 1 & 0 \\ 0 & 2 \end{pmatrix}(1002)
(0220)\begin{pmatrix} 0 & 2 \\ 2 & 0 \end{pmatrix}(0220)