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 GridLayout （2，2））；  
Panel p1 = new panel（）；  
 Add（p1）；  
 Button b1= new Button （“One”）；  
 P1.add（b1）； 
 Panel p2 = new panel（）；  
 Add（p2）；  
Button b2= new Button （“Two”）；  
 P2.add（b2）；  
 Button b3= new Button （“Three”）； 
 add（b3）；  
Button b4= new Button （“Four”）；  
add（b4）；  
）  
）  
Which two statements are true？ （）

A .  All the buttons change height if the frame height is resized.
B .  All the buttons change width if the Frame width is resized.
C .  The size of the button labeled “One” is constant even if the Frame is resized.
D .  Both width and height of the button labeled “Three” might change if the Frame is resized.