Your customer is looking for zero-data-loss failover with maximum data protection and high availability for their
primary database. Which two solutions would you recommend to the customer if the distance between the
primary and the standby location is more than 300 miles?
A.
Asynchronous redo transport with Data Guard
B.
Synchronous redo transport with Data Guard
C.
Active Data Guard Far Sync
D.
Data Guard SQL Apply
Explanation:
http://www.oracle.com/technetwork/database/availability/active-data-guard-wp-12c-1896127.pdf