What are the two features of the storage engine in the SAP HANA index server that enable data consistency and maintain durable changes? Please choose

What are the two features of the storage engine in the SAP HANA index server that enable data consistency and maintain durable changes? Please choose
A . Metadata Manager and Transaction Manager
B . Page Management and logge
C . Column Store and Row Store
D . Session Management and log Volumes

Answer: B