C and E.
https://docs.oracle.com/cd/B28359_01/server.111/b28318/schema.htm#CNCPT111
A schema is a collection of logical structures of data, or schema objects. A schema is owned by a database user and has the same name as that user. Each user owns a single schema. Schema objects can be created and manipulated with SQL and include the following types of objects:
Answer should be C and D.
C is ACID which Oracle SQL always do
https://docs.oracle.com/cd/B13789_01/server.101/b10759/statements_8003.htm
CREATE USER my_user IDENTIFIED BY my_password DEFAULT TABLESPACE tbspace1 QUOTA UNLIMITED ON tbspace1;
GRANT schema1, schema2 TO my_user;
GRANT schema1, schema2 TO my_user make error , can grant only role or privileges
https://docs.oracle.com/en/database/oracle/oracle-database/19/sqlrf/GRANT.html#GUID-20B4E2C0-A7F8-4BC8-A5E8-BE61BDC41AC3
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