According to the study by Peter Cappelli and Peter Sherer, which of the following is true of two$-$tier wage plans?

The plans are characterized by instances in which two employees doing different levels of jobs get the same pay.

Lower$-$paid employees always move to the higher$-$paying tier.

Lower$-$tier employees are more satisfied despite being paid less money for the same work.

The employees in the lower tier have lower comparison standards than those in the higher tier.

The lower$-$tier employees remain dissatisfied until they move into the higher$-$paying tier.