Which statement about incentive pay is$$ correct?

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Part $1$

A$.$

Incentive pay is more costly for firms than seniority and merit pay.

B$.$

Incentive pay is a$$ one$-$time payment that augments an$$ employee's base pay.

C$.$

Incentive pay is used to reward individual employees but not groups.

D$.$

Incentive pay replaces an$$ employee's traditional pay at most firms.

E$.$

Incentive pay is limited to production and nonsupervisory employees.