Matching with the Correct Basic Types of Complex Contracts

Matching with the correct basic types of complex contracts:
-Fixed price contracts

A) features a mix of contracts; there is a wide variety of such contracts add what unites them is the attempt to provide positive incentives within the contract to motivate collaborative relationships between parties.
B) those where the price is fixed for the supply of an agreed amount of work.
C) those whose goods and services are provided at an agreed rate as a function of an agreed parameter. These are used where it is possible to identify broadly the type of resources required, but not in enough detail to specify closely.