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

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

出自：Oracle认证

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