public class enclosingone&e

题目类型：[单选]public class enclosingone （    public class insideone{}   ）   public class inertest（   public static void main （stringargs）（   enclosingone eo= new enclosingone ()；    //insert code here  ）  ）   Which statement at line 7 constructs an instance of the inner class？()
A、 InsideOnew ei= eo.new InsideOn()；
B、 Eo.InsideOne ei = eo.new InsideOne()；
C、 InsideOne ei = EnclosingOne.new InsideOne()；
D、 EnclosingOne.InsideOne ei = eo.new InsideOne()；