Project Management Professional (PMP) Exam Practice – Question1628 A purchase order is a good example of which form of contracting? A. Unilateral B. Bilateral C. Trilateral D. Severable Show Answer Hide Answer Correct Answer: A Explanation: Explanation: The purchase order is a unilateral (one signature) offer that includes a promise to pay upon delivery. Post navigation Project Management Professional (PMP) Exam Practice – Question1627Project Management Professional (PMP) Exam Practice – Question1629