public abstract class Shape {  private int x；  private int y；  public abstract void draw（）；  public void setAnchor（int x， int y） {  this.x = x；  this.y = y；  }  }  Which two classes use the Shape class correctly？（）
选项：

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 */} }
F: public abstract class Circle implements Shape { private int radius；public void draw（） { / code here */ } }