Which of the following represents a reasonable use of the UNIQUE constraint?

Group of answer choices

Placing a UNIQUE constraint on the phone$\_$number column of a CUSTOMER table to help prevent duplicate entries for the same customer

Placing a UNIQUE constraint on the VIN $($vehicle identification number, which is unique to each vehicle$)$ column of a VEHICLE table to help detect and prevent the insertion of duplicate records for the same vehicle

Placing a UNIQUE constraint on the postal$\_$code column of an ADDRESS table to help prevent duplicate addresses

Placing a UNIQUE constraint on $\{$first$\_$name, last$\_$name$\}$ in an EMPLOYEE table to prevent two employees with the same first name and last name from being inserted into the table

Placing a UNIQUE constraint on a Social Security Number in an EMPLOYEE table to prevent the insertion of two employees with the same social security number or duplicate entries for the same employee