[单选题]
A 10-m uniform beam of weight 100y;4dyb j f -fq::rbc.he7ruq; N is supported byua41aza ekufawg5 9l 77*:gpi two ropes at the ends. If a 400-N person sits at 2.0 m from the left end of the beam, what is the tension in the19p5gzi :7aefuk la4 7aau*gw left rope?
A. $130 \; N$
B. $250 \; N$
C. $370 \; N$
D. $500 \; N$
