绘制图示结构的弯矩图，弯矩图正确的是（     ）

<img src、"http://zhejiang.ouchn.cn/pluginfile.php/61593/question/answer/385524/25/246882/11-02-A.jpg" alt="" width="247" height="114">

<img src、"http://zhejiang.ouchn.cn/pluginfile.php/61593/question/answer/385524/25/246883/11-02-B.jpg" alt="" width="247" height="114">

<img src、"http://zhejiang.ouchn.cn/pluginfile.php/61593/question/answer/385524/25/246884/11-02-C.jpg" alt="" width="247" height="114">

<img src、"http://zhejiang.ouchn.cn/pluginfile.php/61593/question/answer/385524/25/246885/11-02-D.jpg" alt="" width="286" height="114">