[单选题]
A 10-m uniform beam of weight 10g)0horzlozh* y1f* *q ova6n 40 N is supported b; b9v fs;sbbskokl6lc( 6y*(im2vry (y two ropes at the ends. If a 400-N person sits at 6vkrb s (o kvb (* 2;ysbl(iy6s9lfc;m2.0 m from the left end of the beam, what is the tension in the left rope?
A. $130 \; N$
B. $250 \; N$
C. $370 \; N$
D. $500 \; N$
