Garrett's contract management model provides a comprehensive framework for the seller's activities throughout the entire contract life cycle. This life cycle is broadly divided into pre-award, award, and post-award phases. The pre-award phase includes critical early-stage activities such as the "bid/no-bid decision making" and, if a bid is pursued, "proposal preparation." The post-award phase covers contract performance and administration, culminating in "contract close-out," which formally concludes the contractual relationship. Since all the listed options are integral and distinct phases within this widely recognized model, "All of the above" is the correct choice.

A. This option is incomplete as it only represents the initial go/no-go decision in the pre-award phase, omitting proposal and post-award activities.

B. This option is incomplete; while a core pre-award activity, it excludes the preceding bid decision and the entire post-award phase.

C. This option is incomplete because it only covers the final stage of the contract, ignoring all pre-award and performance activities.

1. National Contract Management Association. (2019). Contract Management Body of Knowledge (CMBOK) (6th ed.). Section 1.3, "The Contract Life Cycle," pp. 14-17. This section outlines the seller's life cycle, which includes the pre-award activities of acquisition planning (encompassing bid/no-bid) and solicitation planning (proposal prep), as well as the post-award activity of contract closeout.

2. Garrett, G. A. (2010). The Project Manager's Pocket Survival Guide. CCH Incorporated. In this and other works, Garrett details the seller's contract management life cycle, consistently including phases for bid/no-bid analysis, proposal development, and contract closeout as fundamental components.