图示矩形对其底边z轴的惯性矩为( )。

• A.<img src="https://timg.fentiku.com/97/2016/12/22/5Qfezj5UmC.png" title='5Qfezj5UmC.png' alt='5Qfezj5UmC.png'/>
• B.<img src="https://timg.fentiku.com/97/2016/12/22/c1yNeqZUkH.png" title='c1yNeqZUkH.png' alt='c1yNeqZUkH.png'/>
• C.<img src="https://timg.fentiku.com/97/2016/12/22/X1v89eo8mn.png" title='X1v89eo8mn.png' alt='X1v89eo8mn.png'/>
• D.<img src="https://timg.fentiku.com/97/2016/12/22/Wa9m2ZwSgs.png" title='Wa9m2ZwSgs.png' alt='Wa9m2ZwSgs.png'/>

正确答案：A