有如下代码,请为指定位置选择正确代码。( ) class Outer{ class Inner{ void show() { System. out .println( "inner" ); } } public void aOuterMethod() { // 1 } public static void main(String[] args ) { Outer out = new Outer(); // 2 Outer.Inner inn=out.new Inner(); // inn.show(); } } A. ① new Inner(); B. ② Inner inn=new out.Inner(); C. ② Inner = new Inner() D. ② Inner inn=out.new Inner(); E. ② Outer.Inner inn=out.new Inner(); F. ① this.show();