public class foo { 
static String s； 
public static void main （String[]args） { 
system.out.printIn （“s=” + s）； 
}
} 
What is the result？（）  

A. The code compiles and “s=” is printed.
B. The code compiles and “s=null” is printed.
C. The code does not compile because string s is not initialized.
D. The code does not compile because string s cannot be referenced.
E. The code compiles， but a NullPointerException is thrown when toString is called.