Which Transact-SQL statement should you use?

You administer a Microsoft SQL Server 2012 database. You create an availability group named haContosoDbs. Your primary replica is available at Server01Contoso01. You need to configure the availability group to minimize transaction latency on any available secondary databases. In the event of a database failure, the designated secondary database should come online automatically. Which Transact-SQL statement should you use?
A. ALTER AVAILABILITY GROUP haContosoDbs MODIFY REPLICA ON ‘Server01Contoso01’
WITH (AVAILABILITY_MODE = ASYNCHRONOUS_COMMIT, FAILOVER_MODE = AUTOMATIC)
B. ALTER AVAILABILITY GROUP haContosoDbs MODIFY REPLICA ON ‘Server01Contoso01’
WITH (AVAILABILITY_MODE = SYNCHRONOUS_COMMIT, FAILOVER_MODE = MANUAL)
C. ALTER AVAILABILITY GROUP haContosoDbs MODIFY REPLICA ON ‘Server01Contoso01’
WITH (AVAILABILITY_MODE = SYNCHRONOUS_COMMIT, FAILOVER_MODE = AUTOMATIC)
D. ALTER AVAILABILITY GROUP haContosoDbs MODIFY REPLICA ON ‘Server01Contoso01’
WITH (AVAILABILITY_MODE = ASYNCHRONOUS_COMMIT, FAILOVER_MODE = MANUAL)

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