Which of the following would not be a good candidate for a primary key? a. the number of seats on a bus in a table that stores data about a city’s fl eet of buses b. a bus pass number in a table of a...

Which of the following would not be a good candidate for a primary key?

a. the number of seats on a bus in a table that stores data about a city’s fl eet of buses

b. a bus pass number in a table of a city’s bus service customers

c. a bus driver’s ID number in a table that stores data about bus drivers

d. a bus route number in a table that stores bus route data