问题：

[多选]

import java.awt.*；  
public class X extends Frame {  
public static void main （String args） {  
X x = new X（）；  
x.pack（）；  
x.setVisible（true）；  
} 
public X（） {  
setLayout （new BordrLayout（））；  
Panel p = new Panel （）；  
add（p， BorderLayout.NORTH）；  
Button b = new Button （“North”）；  
p.add（b）：  
Button b = new Button （“South”）；  
add（b1， BorderLayout.SOUTH）：  
}  
}  
Which two statements are true？（）

A .  The buttons labeled “North” and “South” will have the same width.
B .  The buttons labeled “North” and “South” will have the same height.
C .  The height of the button labeled “North” can very if the Frame is resized.
D .  The height of the button labeled “South” can very if the Frame is resized.
E .  The width of the button labeled “North” is constant even if the Frame is resized.
F .  The width of the button labeled “South” is constant even if the Frame is resized.