[单选题]
A 10-m uniform beam *:tdgzw v(vupv5w/7t h. qp;p emfw*-ofhh1mhxh;gsl 6dw /*/. g j0ixn weight 100 N is supported by two ropes at the ends. If a 400-N person sits at 2.0 m from the left end of the beam, what is th xh lsigm*hj.w6d/ hh;n0x 1/ge tension in the right rope?
A. $130 \; N$
B. $250 \; N$
C. $370 \; N$
D. $500 \; N$
