单选题：Which one below is true about the StringBuffer class?

Which one below is true about the StringBuffer class? @[D](2)

A. An object of StringBuffer has a fixed size.
B. StringBuffer inherits all the methods from String.
C. An object of StringBuffer can be initialized using the = operator.
D. StringBuffer has append() method to form a larger string.




A.An object of StringBuffer has a fixed size.
B.StringBuffer inherits all the methods from String.
C.An object of StringBuffer can be initialized using the = operator.
D.StringBuffer has append() method to form a larger string.


答案：D