Which methods from the String and StringBuffer classes modify the object on which they are called？（） A、The charAt（） method of the String class.B、The toUpperCase（） method of the String class.C、The replace（） method of the String class.D、The reverse（） method of the StringBuffer class.E、The length（） method of the StringBuffer class.
Which methods from the String and StringBuffer classes modify the object on which they are called？（）
- A、The charAt（） method of the String class.
- B、The toUpperCase（） method of the String class.
- C、The replace（） method of the String class.
- D、The reverse（） method of the StringBuffer class.
- E、The length（） method of the StringBuffer class.
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