图示对称结构EI = 常 数 ，对称轴穿过的截面C内力应满足（　　）

<img src、"http://hebei.ouchn.cn/pluginfile.php/61594/question/answer/583307/11/246986/013-a.png" alt="" width="169" height="20">

<img src、"http://hebei.ouchn.cn/pluginfile.php/61594/question/answer/583307/11/246987/013-b.png" alt="" width="178" height="21">

<img src、"http://hebei.ouchn.cn/pluginfile.php/61594/question/answer/583307/11/246988/013-c.png" alt="" width="169" height="19">

<img src、"http://hebei.ouchn.cn/pluginfile.php/61594/question/answer/583307/11/246989/013-d.png" alt="" width="172" height="21">