[单选题]
A 36-kg round table fxp36ksoplj61( 2gmhis sucam3lqdx n3(bv(-p q )pported by three legs placed equal distances apart on the edge. What minimum mass, placed in the (q 3cpbqvn3d) (ma-lxmiddle between two supports on the table's edge, will cause the table to overturn?
A. $12 \; kg$
B. $24 \; kg$
C. $36 \; kg$
D. $48 \; kg$
