[单选题]
A 36-kg round table is supported by xjz l7y:9dmp+sfb7eo l ;r77zthree legs tcu.sm s+vq2-6 9iqpoplaced equal distances apart on the edge. What minimum mass, placed in the middle between two supports on the tabqov 6si2ps +ucm-9t.q le's edge, will cause the table to overturn?
A. $12 \; kg$
B. $24 \; kg$
C. $36 \; kg$
D. $48 \; kg$
