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