单选题In a database with the database character set of US7ASCII and a national character set of UTF-8， which datatypes would be capable of storing Unicode data by default？（）A VARCHAR2B CHARC NVARCHAR2D CLOBE LONG
单选题
In a database with the database character set of US7ASCII and a national character set of UTF-8， which datatypes would be capable of storing Unicode data by default？（）
A
VARCHAR2
B
CHAR
C
NVARCHAR2
D
CLOB
E
LONG
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解析：
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