A <img src="https://www.beizhujiaoyu.com/uploads/202208/44fda431caca444ebafd27ead00116f7.png" alt="" width="35" height="44" title="" align="" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/bf6ba5f53b96437db2c2369de1833cec.png" alt="" width="25" height="47" title="" align="" /> C -1/2 D 1/2