At a large car dealership, the accounting analyst uses a table containing the following columns: vehicle$\_$id$,$ vehicle$\_$name, quantity, price, manufacturer$\_$id$.$

Which columns are most likely to be the primary and secondary keys?

a$.$

Primary key: vehicle$\_$id$,$ secondary key: manufacturer$\_$id

b$.$

Primary key: vehicle$\_$id$,$ secondary key: vehicle $\_$name

c$.$

Primary key: quantity, secondary key: price

d$.$

Primary key: manufacturer$\_$id$,$ secondary key: vehicle$\_$id