To ensures that the database can be restored to the most recent committed state after a restart which of the following Indexserver components make sure such consistency and maintain durable changes?

To ensures that the database can be restored to the most recent committed state after a restart which of the following Indexserver components make sure such consistency and maintain durable changes?
A . Storage Engine
B . Disk Storage
C . Relational Engines
D . Request Processing

Answer: A