2011年对某市随机抽取1000名青少年调查发现，有25%的孩子超重。则该市超重青少年比重95%的置信区间为（　　）。

A、<img src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/a2ea0850-b8fc-4e12-8dc2-57a80ed4018c.jpg" width="171" height="48" />

B、<img src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/aa35df05-4781-4905-a253-88759b6acbd2.jpg" width="170" height="41" />

C、<img src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/e3921f21-d4b4-439e-83c2-1fb70d9bcb75.jpg" width="168" height="44" />

D、<img src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/10d13eb1-897b-40d6-af53-bf7f850cca09.jpg" width="170" height="44" />