Whichtwostatementsaretrueaboutsimpleviews?()

Whichtwostatementsaretrueaboutsimpleviews？()

A.Viewscanbecreatedasreadonly.

B.Viewsaredatasegmentsliketables.

C.Viewscanbecreatedonthebasisofmorethanonetable.

D.Datamanipulationlanguage（DML）operationscannotbeperformedonviews.