Eddie was surprised to learn that not everyone would receive a bonus this year. Instead, management planned to rank all of the employees in Eddie's division and award bonuses only to the top $10$ percent in terms of sales. Eddie's company is using a$($n$)\_\_\_\_\_\_\_\_$ performance review system.

a$.$

Behavioral distribution

b$.$

Forced ranking

c$.$

Trait ranking

d$.$

Curved recompensation

e$.$

Unit grading

f$.$

Functional positioning