when we outsoure the system development proj?ects to a third party developer, we usually have there contract options: If the business needs are not entirely clear and we need the system at all cost, the suitable contract is A. Fixed price contract, time-arrangement contract. and fixed deadline @ B. Fixed price contract, time-arrangement contract, and value-added contract: time-arra C. Fixed price contract. time-arrangement contract: time-arrangement contract. time-arrangement contract contract, and value-added contract: fixed price contract D. Fixed price contract, time-arrangement contract and fixed deadline contract: fixed price contract