在双代号网络图中,A 工作完成后同时进行B 和C 工作,表达上述逻辑关系正确的是( )。
A <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20260105/21861067_0.png"> B
<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20260105/21861067_0_1.png"> C
<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20260105/21861067_0_2.png"> D
<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20260105/21861067_0_3.png">