Which three statements are true regarding the data types in Oracle Database 10g/11g?（）
- AOnly one LONG column can be used per table
- BA TIMESTAMP data type column stores only time values with fractional seconds
- CThe BLOB data type column is used to store binary data in an operating system file
- DThe minimum column width that can be specified for a VARCHAR2 data type column is one
- EThe value for a CHAR data type column is blank-padded to the maximum defined column width