Question: Which one ( s ) are correct to describe a String object? _ _ _ _ _ _ . A . Chars ( index )

Which one(s) are correct to describe a String object? ______.
A.
Chars(index) returns the character at a specified position in a String object, with the first character of string at index 0
B.
Length returns the number of characters in a String object
C.
ToUpper/ToLower converts a String object to all uppercase/lowercase characters
D.
Trim removes all spaces from the beginning and end of a String object

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