WhiBasically a phenomenon of the union sector, two-tier wage structures differentiate pay based upon the _____. Question 48 options: 1) type of work 2) hiring date 3) place of work 4) length of contract, if applicablech o_____ is movement through the wage ranges where seniority is specified as the basis of the movement. Question 45 options: 1) Length-of-stay progression 2) Automatic progression 3) Merit differential 4) Performance differentialf the following is a benefit under Social Security? Question 28 options: 1) Lump-sum death payments 2) Job security 3) Work/life balance 4) Overtime pay