Which three statements are true regarding the use of the Database Migration Assistant for Unicode (DMU)?

Which three statements are true regarding the use of the Database Migration Assistant for
Unicode (DMU)?

A.
A DBA can check specific tables with the DMU

B.
The database to be migrated must be opened read-only.

C.
The release of the database to be converted can be any release since 9.2.0.8.

D.
The DMU can report columns that are too long in the converted characterset.

E.
The DMU can report columns that are not represented in the converted characterset.

Explanation:
A: In certain situations, you may want to exclude selected columns or tables from
scanning or conversion steps of the migration process.
D: Exceed column limit
The cell data will not fit into a column after conversion.
E: Need conversion
The cell data needs to be converted, because its binary representation in the
target character set is different than the representation in the current character
set, but neither length limit issues nor invalid representation issues have been
found.
* Oracle Database Migration Assistant for Unicode (DMU) is a unique next-generation migration
tool providing an end-to-end solution for migrating your databases from legacy encodings to
Unicode.
Incorrect:
Not C: The release of Oracle Database must be 10.2.0.4, 10.2.0.5, 11.1.0.7, 11.2.0.1, or later.