What type of notice must the Contracting Officer provide to offerors whose proposals were not selected for award?

The correct answer focuses on the requirement for the Contracting Officer to inform offerors about the status of their proposals after the selection process has concluded. Postaward notices are essential because they serve as formal communications to those bidders whose proposals were not chosen for award. This process ensures transparency and fairness in the procurement process by providing feedback to the offerors, allowing them to understand why their submissions were not selected. Such notices also help maintain a professional relationship between the contracting authority and potential future bidders.

While pre-award notices pertain to informing offerors before the selection of proposals, and bid rejections simply indicate that a proposal has not been accepted, understanding the timeline and context of these communications is crucial. Final Decision Notices may imply a more definitive conclusion after discussions or clarifications, but they do not capture the specific notification following the decision to award a contract. Thus, Postaward Notices are the appropriate mechanism for notifying unsuccessful offerors about their proposal status.