which three statements correctly describe the functions and use of constraints? (Choose three)

Q. which three statements correctly describe the functions and use of constraints? (Choose three)

A. constraints provide data independence
B. constraint make complex queries easy
C. constraints enforce rules at the view level
D. constraints enforce rules at the table level
E. constraints prevent the deletion of a table if there are dependencies
F. constraints prevent the deletion of an index if there are dependencies

Answer: CDE