Question $13$

$3$ pts

Which of the following is true about a foreign key attribute $($column$)?$

It must be linked $($related to$)$ to an alternate key attribute $($column$)$ in the same or another table.

It must be linked $($related to$)$ to a non$-$unique attribute $($column$)$ in the same or another table.

It must be linked $($related to$)$ a primary key attribute $($column$)$ in the same or another table.

It must be linked $($related to$)$ to a composite key attribute $($column$)$ in the same or another table.