[单选题]
A 10-m uniform beam of weight 1 c5diqu :g,s:hsk9k *j00 N is supported by two r.dxb3)+y*pmy ib2 q tiopes at the ends. If a 400-N person sits at 2.0 m from the left end of the beam, what is*mqi2pxtb3yd b) y.+i the tension in the left rope?
A. $130 \; N$
B. $250 \; N$
C. $370 \; N$
D. $500 \; N$