Whichtwostatementsaretrueregardingviews?()

Whichtwostatementsaretrueregardingviews？()

A.AsubquerythatdefinesaviewcannotincludetheGROUPBYclause

B.AviewthatiscreatedwiththesubqueryhavingtheDISTINCTkeywordcanbeupdated

C.AviewthatiscreatedwiththesubqueryhavingthepseudocolumnROWNUMkeywordcannotbeupdated

D.Adatamanipulationlanguage(DML)operationcanbeperformedonaviewthatiscreatedwiththesubqueryhavingalltheNOTNULLcolumnsofatable