Which of the following statements is true of a maturity curve?

a$.$

It is used to identify benchmarks or key jobs in an organization.

b$.$

It is used when collecting information on compensation paid to employees by other employers in a particular geographic area, industry, or occupational group.

c$.$

It is used to express the relationship between pay and job responsibilities.

d$.$

It is used when the annual increase in pay varies based on the actual number of years of service a person has accumulated.