Given:

public class Canvas implements Drawable {

public void draw () { }

}

public abstract class Board extends Canvas { }

public class Paper extends Canvas {

protected void draw (int color) { }

}

public class Frame extends Canvas implements Drawable {

public void resize () { }

}

public interface Drawable {

public abstract void draw ();

}

Which statement is true?

Board does not compile.

A.

Paper does not compile.

B.

Frame does not compile.

C.

Drawable does not compile.

D.

E. All classes compile successfully.