Why do we designate one of the candidate keys of a relation to be the primary key?

The two main ways in which marketers address the competition with their strategies are by satisfying a need better than a competition and by

The head restraint should be adjusted so that it reaches a.the top of your ears b.the base of your skull c.the top of the head

If you embed a word table into powerpoint, what happens when you make edits to the embedded data? a. edits made to embedded data change the data in the source file; however, edits made to the source file will not be reflected in the embedded data. b. edits made to embedded data will change the data in the source file, and edits made to the source file will be reflected in the embedded data. c. edits made to embedded data don't change the data in the source file, nor will edits made to the source file be reflected in the embedded data. d. edits made to embedded data don't change the data in the source file; however, edits made to the source file will be reflected in the embedded data.