some questions of anonymous inner class

[arden liu]

77. which statement is true?
A. An anonymous inner class may be declared as final
B. An anonymous inner class can be declared as private
C. An anonymous inner class can implement mutiple interfaces
D. An anonymous inner class can access final variables in any enclosing scope
E. Construction of an instance of a static inner class requires an instance of the encloing outer class

the answer is D
Why? could you give me a detailed explanation?
Thanks a lot.

[Barry Gaunt]

What's the source of the question, please?

[arden liu]

i just find it from one website.