In trying to delete from the employee table, what is the cause of this error: "Query failed because of: error: update or delete on table "employee"

violates foreign key constraint "customer$\_$support$\_$rep$\_$id$\_$fkey" on table

"customer"?

a$.)$

The customer table data has to be deleted first or have the support$\_$rep$\_$id updated to a different rep.

b$.)$

The customer$\_$id in the customer table has to match the employee$\_$id table.

c$.)$

The support$\_$rep$\_$id in the employee table doesn't exist.

d$.)$

The report$\_$to column links to the employee$\_$id in the employee table that has the value that exists.