Given two tables, DEPARTMENT$($dept$\_$id$,$ dept$\_$location, dept$\_$name$)$ and EMPLOYEE$($emp$\_$id$,$ emp$\_$name, emp$\_$dept$\_$id$,$ emp$\_$name, emp$\_$salary$),$ which attribute $($column$)$ is the foreign key?

Question $4$ options:

DEPARTMENT table, dept$\_$id column

DEPARTMENT table, dept$\_$location column

DEPARTMENT table, dept$\_$name column

EMPLOYEE table, emp$\_$id column

EMPLOYEE table, emp$\_$salary column

EMPLOYEE table, dept$\_$id column

EMPLOYEE table, emp$\_$name column