【单选题】
public class foo { <br /> static String s； <br /> public static void main （String[]args） { <br /> system.out.printIn （“s=” + s）； <br /> }<br /> } <br /> 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.
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