<img src="https://nimg.ppkao.com/2018-07/luke/2018073110033551835.jpg?sign=22f9a9d79838a0161a144991c8e06a5c&t=62d09f89" /><br /> What is the result?()
A、 foo has the value””
B、 foo has the value null.
C、 An exception is thrown.
D、 The code will not compile.