阅读以下程序public class Shape{private string comments;protected string name;public string Name{ get{ return name;} set{name = value;}}public void Draw() {}}public class Rectangle:Shape{protected int width;protected int height;public int Width{get{return width;} set{width=value;}}public int Height{get{return height;} set{height=value;}}public int ComputeArea(){}}以上Shape类中在Rectangle类中不可见的是（）
选项：

A:comments
B: name
C: Name
D: Draw()