Which of the following would make the most effective primary key in a patient contact information table? Patient-selected values they will easily remember. Concatenated codes based on patient initials and dates of birth. Arbitrary numbers. Patient email addresses, Question 14 Which of the following is true regarding the representation of data relationships? A foreign key should not be used to represent a data relationship. Relationships can be represented between tables and/or files. Relationships can be represented between tables only. A concatenated key should not be used to represent a data relationship