Which statements are true for a two-node, active-active OGG replication configuration?

Which statements are true for a two-node, active-active OGG replication configuration?
Both databases may be live and processing transactions.

–
The two databases must be homogeneous.
Low latency reduces the risk of conflicts.

A.
1 and 2

B.
2 and 3

C.
1 and 3

D.
I, 2, and 3

Explanation:
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:2812197300346109
609