[单选题]
A 10-m uniform beam ) k5i, zk:/ibtc*mbba of wy: npy-knj1o 3b(s7lneight 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 yn31:n bjk ylo(7s-pnthe beam, what is the tension in the right rope?
A. $130 \; N$
B. $250 \; N$
C. $370 \; N$
D. $500 \; N$
