图示结构在外荷M作用下产生的剪力图正确的是( )。

• A.<img src="https://timg.fentiku.com/97/2016/12/22/jVhGwfgZSm.png" title='jVhGwfgZSm.png' alt='jVhGwfgZSm.png'/>
• B.<img src="https://timg.fentiku.com/97/2016/12/22/6N6haQ12J3.png" title='6N6haQ12J3.png' alt='6N6haQ12J3.png'/>
• C.<img src="https://timg.fentiku.com/97/2016/12/22/LW4ZQMaVoV.png" title='LW4ZQMaVoV.png' alt='LW4ZQMaVoV.png'/>
• D.<img src="https://timg.fentiku.com/97/2016/12/22/rPsEVessy0.png" title='rPsEVessy0.png' alt='rPsEVessy0.png'/>

正确答案：A