[单选题]
A traffic light of weight*w. nwlbql d imq1qxg7d )x7 * y*jt:f,4:qkoj 100 d 9az :wcy,hy1xw t4+la7rp0vN is supported by two ropes as shown in Fig. 4-2. What are yrl0p tvzd+hwa:97yw a14xc,the tensions in the ropes?
A. $50 \; N$
B. $63 \; N$
C. $66 \; N$
D. $83 \; N$
