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 Strings is not initialized.
• D、 The code does not compile because because Strings cannot be referneed.
• E、 The code comiles.butt a NullPointerException is thrown when toString is called.