Which is the earliest line in the following code after which the object created on the line marked （0） will be a candidate for being garbage collected， assuming no compiler optimizations are done？ （） 
public class Q76a9 {  
static String f（） {  
String a = "hello"；  
String b = "bye"； // （0） 
 String c = b + "!"； // （1）  
String d = b；  b = a； // （2）  
d = a； // （3）  
return c； // （4）  }  
public static void main（String args[]） { 
 String msg = f（）；  
System.out.println（msg）； // （5） 
 }  
}  

Which statements can be inserted at the indicated position in the following code to make the program write 1 on the standard output when run？（） 
public class Q4a39 { 
int a = 1；  
int b = 1；  
int c = 1；  
class Inner {  
int a = 2；  int get（） {  
int c = 3；  
// insert statement here  return c； 
 }  
}  Q4a39（） {  
Inner i = new Inner（）；  
System.out.println（i.get（））；  }  
public static void main（String args[]） { 
 new Q4a39（）； 
 }  
}