How can you achieve this?

There is MS Visual Studio 2010 and MS .NET Framework 4 application PassGuideApp.
PassGuideApp connects to a SQL Server database over the local network.
PassGuideApp uses data from different related database tables.
Assume there the connection is unavailable or disconnected.
PassGuideApp must still work in this circumstance.
How can you achieve this? Select two.

A.
Use type object…

B.
Use OLE object..

C.
Use object type..

D.
Use SQL object..

E.
Use data entity…

F.
.. DataAdapter to store data.

G.
.. DataSet to store data.

H.
.. DataReader to store data.

I.
.. DataWriter to store data.

J.
.. Data to store data.
K.
.. Data Services to store data.

Explanation: