What is the incentive under fee$-$for$-$service reimbursement?

Question $17$ options:

A$)$

Patients have the incentive to consume more services than necessary

B$)$

Providers have an incentive to deliver nonessential services

C$)$

Payers have the incentive to reduce reimbursement

D$)$

Insurers have an incentive to reduce premium costs