10. class Line {  11. public static class Point { }  12. }  13.  14. class Triangle {  15. // insert code here  16. }  Which code， inserted at line 15， creates an instance of the Point class defined in Line？（） 

A.  Point p = new Point（）；

B.  Line.Point p = new Line.Point（）；

C.  The Point class cannot be instatiated at line 15.

D.  Line 1 = new Line（） ； 1.Point p = new 1.Point（）；