多选题Given two different character sets （A and B）， which of the following must be true for A to be considered a strict superset of B？（）AA must contain all of the characters defined in BBA must be UnicodeCThe encoded values in A must match the encoded values in B for all characters defined in BDA must be a multibyte character setEThe encoded values in A must match the encoded values in B for all numeric and alphabetic character
多选题
Given two different character sets （A and B）， which of the following must be true for A to be considered a strict superset of B？（）
A
A must contain all of the characters defined in B
B
A must be Unicode
C
The encoded values in A must match the encoded values in B for all characters defined in B
D
A must be a multibyte character set
E
The encoded values in A must match the encoded values in B for all numeric and alphabetic character
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