Ensures that each row is uniquely identified by the primary key, which means that a proper search for an existing tuple (row) will always be successful. a. system integrity b. referential integrity c. entity integrity d. database integrity

Solution:

Database integrity ensures that each row is uniquely identified by the primary key, which means that a proper search for an existing tuple (row) will always be successful.

Thus the required answer is D

you cant i guess your 18 now lol

yes, but you must first make sure that you'll be able to make your turn or you can crash into other vehicles.