• A.<img src="http://timg.fentiku.com/javaimportItems/c3d7f1f46b134b04a45ef65b42202eda/images/2cf82.png"><br/>
• B.<img src="http://timg.fentiku.com/javaimportItems/c3d7f1f46b134b04a45ef65b42202eda/images/2d9f3.png"><br/>
• C.<img src="http://timg.fentiku.com/javaimportItems/c3d7f1f46b134b04a45ef65b42202eda/images/2e3f2.png"><br/>
• D.<img src="http://timg.fentiku.com/javaimportItems/c3d7f1f46b134b04a45ef65b42202eda/images/2ee8d.png"><br/>

正确答案：A