下列各项中，何者为图Ⅰ的弯矩图？

• A.<img src="https://timg.fentiku.com/97/2016/12/22/I2E6Oh7L5D.png" title='I2E6Oh7L5D.png' alt='I2E6Oh7L5D.png'/>
• B.<img src="https://timg.fentiku.com/97/2016/12/22/jio1Fwy1gQ.png" title='jio1Fwy1gQ.png' alt='jio1Fwy1gQ.png'/>
• C.<img src="https://timg.fentiku.com/97/2016/12/22/ivJF0epNqI.png" title='ivJF0epNqI.png' alt='ivJF0epNqI.png'/>
• D.<img src="https://timg.fentiku.com/97/2016/12/22/LwNlgHaeWu.png" title='LwNlgHaeWu.png' alt='LwNlgHaeWu.png'/>

正确答案：C