package foo； public class Outer { public static class Inner { } } Which statement is true？（）

A. Compilation fails.
B. An instance of the Inner class can be constructed with “new Outer.Inner（）”.
C. An instance of the Inner class cannot be constructed outside of package foo.
D. An instance of the Inner class can be constructed only from within the Outer class.
E. From within the package foo， and instance of the Inner class can be constructed with “new Inner（）”.