A unilateral contract under which the seller is paid a preset amount per unit of service is called _

A unilateral contract under which the seller is paid a preset amount per unit of service is called __________.

A.
A cost reimbursable contract

B.
A lump sum contract

C.
A time and material contract

D.
A fixed price contract

Explanation:
A unilateral contract under which the seller is paid a preset amount per unit of service is called __________.