[单选题]
A 10-m uniform beam of weight 100 N is suppo e;h z wms71g39x2vbefrted by two ropes at the endes 7-+7d b:wvu2t ur;m:gjvkbs. If a 400-N person sits at 2.0 m from the left end of the b m:v; 7 urtuvbw-:ks e27+jgdbeam, what is the tension in the left rope?
A. $130 \; N$
B. $250 \; N$
C. $370 \; N$
D. $500 \; N$
