Select all that apply.

• A

  Manage large amounts of data in a multiuser environment so that many users can concurrently access
  the same data;

• B

  Control access to data in terms of security, using its own user authorization concept

• C

  Maintain relationships between data

• D

  Recover data to point of known consstency n the event of a system failure

• E

  Deliver high performance for processing of data requests