图示几种排架高度均为h，则固端弯矩最大的是()。

• A.<img src="https://timg.fentiku.com/img/2018-04-09/5acafcc492b36.png" alt="" />
• B.<img src="https://timg.fentiku.com/img/2018-04-09/5acafcc4b0bb5.png" alt="" />
• C.<img src="https://timg.fentiku.com/img/2018-04-09/5acafcc4cf405.png" alt="" />
• D.<img src="https://timg.fentiku.com/img/2018-04-09/5acafcc4f3a15.png" alt="" />

正确答案：D