Amazon RDS automated backups and DB Snapshots are currently supported for only the ______ storage engine

Duplicate of http://www.aiotestking.com/amazon/amazon-rds-automated-backups-and-db-snapshots-are-currently-supported-for-only-the-storage-engine/

A
Amazon RDS automated backups and DB snapshots are currently supported for all DB engines. For the MySQL DB engine, only the InnoDB storage engine is supported; use of these features with other MySQL storage engines, including MyISAM, may lead to unreliable behavior while restoring from backups. Specifically, since storage engines like MyISAM do not support reliable crash recovery, your tables can be corrupted in the event of a crash. For this reason, we encourage you to use the InnoDB storage engine.
http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Overview.BackingUpAndRestoringAmazonRDSInstances.html

Correct answer is B