Hệ phương trình \(\left\{ \begin{array}{l}x + y + xy = \frac{7}{2}\\{x^2}y + x{y^2} = \frac{5}{2}\end{array} \right.\) có nghiệm là:

A. \(\left( {3;2} \right);\left( { - 2;1} \right).\)

B. \(\left( {0;1} \right),\left( {1;0} \right).\)

C. \(\left( {0;2} \right),\left( {2;0} \right).\)

D. \(\left( {2;\frac{1}{2}} \right);\left( {\frac{1}{2};2} \right).\)