Which statement is true about transactions?

Which statement is true about transactions?

A.
A set of Data Manipulation Language (DML) statements executed in a sequence ending with a SAVEPOINT
forms a single transaction.

B.
Each Data Definition Language (DDL) statement executed forms a single transaction.

C.
A set of DDL statements executed in a sequence ending with a COMMIT forms a single transaction.

D.
A combination of DDL and DML statements executed in a sequence ending with a COMMIT forms a single
transaction.

Explanation:
https://docs.oracle.com/database/121/CNCPT/transact.htm#CNCPT038