已知

• A.<img src="http://timg.fentiku.com/javaimportItems/9c2809669a144963a76c2031ec2fa7ce/images/7c82.png"><br/>
• B.<img src="http://timg.fentiku.com/javaimportItems/9c2809669a144963a76c2031ec2fa7ce/images/8412.png"><br/>
• C.0<br/>
• D.1<br/>

正确答案：D