What is the perimeter of this rectangle ? (x 1 ;y 2 ); (x_{2}, y_{2}); (x_{1}, y_{1}); (x_{2}, y_{1}) O A 2(x_{2} - x_{1}) + 2(y_{2} - y_{1}) OB (x_{2} - x_{1})(y_{2} - y_{1}) OC sqrt 2(y 2 -y 1 )(x 2 -) OD . 4sqrt((y_{2} - y_{1}) ^ 2 * (x_{2} - x_{1}) ^ 2); 4(y_{2} - x_{1}) * (x_{2} - y_{1})