图示几种排架高度均为h,则固端弯矩最大的是( )。
A <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13563196_0.jpg"> B
<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13563196_0_1.jpg"> C
<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13563196_0_2.jpg"> D
<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13563196_0_3.jpg">