Given：

Which code， inserted at line 14， allows the Sprite class to compile？（）

A.hi hi
B.hi world
C.world world
D.Compilation fails.
E.An exception is thrown at runtime.

A.public class Circle implements Shape {private int radius；}
B.public abstract class Circle extends Shape {private int radius；}
C.public class Circle extends Shape {private int radius；public void draw（）；}
D.public abstract class Circle implements Shape { private int radius；public void draw（）；}
E.public class Circle extends Shape {private int radius；public void draw（） {/* code here*/}}

A.Compilation fails.
B.An exception is thrown at runtime.
C.The code executes normally and prints "foo".
D.The code executes normally， but nothing is printed.