[单选题]
A 10-m uniform beam l u 3ayk3d((4um6m7q,s ol3ioey 2cs mof we ;gxwn7 *acki0ight 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 the ten7a;k*xig w0cn sion in the left rope?
A. $130 \; N$
B. $250 \; N$
C. $370 \; N$
D. $500 \; N$