Given: 1. abstract class Shape{ 2.Shape ( ){ System.out.println("Shape");} 3.protected void area ( ) { System.out.println("Shape");} 4. } 5. 6. class Square extends Shape{ 7.int side; 8.Square int side { 9./* insert code here */ 10.this.side = side; 11.} 12.public void area ( ) { System.out.println("Square");} 13.} 14. class Rectangle extends Square { 15.int len, br; 16.Rectangle (int x, int y){ 17./* insert code here */ 18.len = x, br = y; 19.} 20. void area ( ) { System.out.println("Rectangle");} 21. } Which two modifications enable the code to compile? (Choose two.) 

Answer options:

A. At line 1, remove abstract
B. At line 9, insert super ( );
C. At line 12, remove public
D. At line 17, insert super (x);
E. At line 17, insert super (); super.side = x;
F. At line 20, use public void area ( ) {

DF